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121766190050 = 2526128092
BaseRepresentation
bin111000101100111010…
…1001001101111100010
3102122022002120100202202
41301121311021233202
53443334121040200
6131534424013202
711540323352351
oct1613165115742
9378262510682
10121766190050
114770592691a
121b723301202
13b63709a23b
145c71b3b998
15327a0811d5
hex1c59d49be2

121766190050 has 54 divisors (see below), whose sum is σ = 230543824329. Its totient is φ = 47848790400.

The previous prime is 121766190001. The next prime is 121766190067. The reversal of 121766190050 is 50091667121.

It can be written as a sum of positive squares in 14 ways, for example, as 11615881729 + 110150308321 = 107777^2 + 331889^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=246745.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121766189986 and 121766190013.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 150514046 + ... + 150514854.

Almost surely, 2121766190050 is an apocalyptic number.

121766190050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121766190050 is a deficient number, since it is larger than the sum of its proper divisors (108777634279).

121766190050 is an frugal number, since it uses more digits than its factorization.

121766190050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 121766190050 in words is "one hundred twenty-one billion, seven hundred sixty-six million, one hundred ninety thousand, fifty".

Divisors: 1 2 5 10 25 50 61 122 305 610 809 1525 1618 3050 3721 4045 7442 8090 18605 20225 37210 40450 49349 93025 98698 186050 246745 493490 654481 1233725 1308962 2467450 3010289 3272405 6020578 6544810 15051445 16362025 30102890 32724050 39923341 75257225 79846682 150514450 199616705 399233410 998083525 1996167050 2435323801 4870647602 12176619005 24353238010 60883095025 121766190050