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1020910180801 = 721927121072
BaseRepresentation
bin11101101101100101111…
…11010001100111000001
310121121010222121200001211
432312302333101213001
5113211311001241201
62100555532130121
7133521051233200
oct16666277214701
93547128550054
101020910180801
11363a69200255
12145a38906941
137536b3c2aa4
14375ab579237
151b852370651
hexedb2fd19c1

1020910180801 has 81 divisors (see below), whose sum is σ = 1283277965697. Its totient is φ = 809694945360.

The previous prime is 1020910180793. The next prime is 1020910180811. The reversal of 1020910180801 is 1080810190201.

The square root of 1020910180801 is 1010401.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1020910180801 - 23 = 1020910180793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020910180811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 9541216590 + ... + 9541216696.

Almost surely, 21020910180801 is an apocalyptic number.

1020910180801 is the 1010401-st square number.

1020910180801 is the 505201-st centered octagonal number.

It is an amenable number.

1020910180801 is a deficient number, since it is larger than the sum of its proper divisors (262367784896).

1020910180801 is an frugal number, since it uses more digits than its factorization.

1020910180801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 1020910180801 in words is "one trillion, twenty billion, nine hundred ten million, one hundred eighty thousand, eight hundred one".

Divisors: 1 7 19 49 71 107 133 361 497 749 931 1349 2033 2527 3479 5041 5243 7597 9443 11449 14231 17689 25631 35287 38627 53179 66101 80143 95779 99617 144343 179417 217531 247009 270389 372253 539387 561001 670453 812879 1010401 1255919 1522717 1819801 1892723 2742517 3775709 4133089 4693171 5690153 7072807 10248353 10659019 12738607 15444701 19197619 26429963 28931623 39831071 57714409 71738471 89170249 108112907 134383333 194718707 202521361 293449319 404000863 502169297 756790349 1096573771 1363030949 2054145233 2828006041 7676016397 9541216643 14379016631 20834901649 53732114779 145844311543 1020910180801