123755735664656 has 40 divisors (see below), whose sum is σ = 252416077819200. Its totient is φ = 58616606206080.

The previous prime is 123755735664629. The next prime is 123755735664661. The reversal of 123755735664656 is 656466537557321.

It is a self number, because there is not a number n which added to its sum of digits gives 123755735664656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11794676 + ... + 19662803.

It is an arithmetic number, because the mean of its divisors is an integer number (6310401945480).

Almost surely, 2^{123755735664656} is an apocalyptic number.

123755735664656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123755735664656 is an abundant number, since it is smaller than the sum of its proper divisors (128660342154544).

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

123755735664656 is a wasteful number, since it uses less digits than its factorization.

123755735664656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31470447 (or 31470441 counting only the distinct ones).

The product of its digits is 2857680000, while the sum is 71.

The spelling of 123755735664656 in words is "one hundred twenty-three trillion, seven hundred fifty-five billion, seven hundred thirty-five million, six hundred sixty-four thousand, six hundred fifty-six".