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68870388543 = 31161109313879
BaseRepresentation
bin100000000100011111…
…1101011101100111111
320120202200210020021020
41000020333223230333
52112021304413133
651345535235223
74655446433535
oct1001077535477
9216680706236
1068870388543
11272315a2290
1211420678b13
1366573c97c8
1434949aa155
151bd137b0b3
hex1008febb3f

68870388543 has 32 divisors (see below), whose sum is σ = 102751756800. Its totient is φ = 40678588800.

The previous prime is 68870388541. The next prime is 68870388551. The reversal of 68870388543 is 34588307886.

It is not a de Polignac number, because 68870388543 - 21 = 68870388541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68870388541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62478 + ... + 376356.

It is an arithmetic number, because the mean of its divisors is an integer number (3210992400).

Almost surely, 268870388543 is an apocalyptic number.

68870388543 is a deficient number, since it is larger than the sum of its proper divisors (33881368257).

68870388543 is a wasteful number, since it uses less digits than its factorization.

68870388543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314063.

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 68870388543 in words is "sixty-eight billion, eight hundred seventy million, three hundred eighty-eight thousand, five hundred forty-three".

Divisors: 1 3 11 33 61 109 183 327 671 1199 2013 3597 6649 19947 73139 219417 313879 941637 3452669 10358007 19146619 34212811 57439857 102638433 210612809 376340921 631838427 1129022763 2086981471 6260944413 22956796181 68870388543