102655977438 has 32 divisors (see below), whose sum is σ = 235694462976. Its totient is φ = 29198750688.

The previous prime is 102655977383. The next prime is 102655977443. The reversal of 102655977438 is 834779556201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5470881 + ... + 5489612.

It is an arithmetic number, because the mean of its divisors is an integer number (7365451968).

It is a 2-persistent number, because it is pandigital, and so is 2⋅102655977438 = 205311954876, but 3⋅102655977438 = 307967932314 is not.

Almost surely, 2^102655977438 is an apocalyptic number.

102655977438 is an abundant number, since it is smaller than the sum of its proper divisors (133038485538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102655977438 is a wasteful number, since it uses less digits than its factorization.

102655977438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10960728.

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 102655977438 in words is "one hundred two billion, six hundred fifty-five million, nine hundred seventy-seven thousand, four hundred thirty-eight".