123633940605864 has 64 divisors (see below), whose sum is σ = 339140998224000. Its totient is φ = 37323453762816.

The previous prime is 123633940605859. The next prime is 123633940605883. The reversal of 123633940605864 is 468506049336321.

It is a junction number, because it is equal to n+sod(n) for n = 123633940605798 and 123633940605807.

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, 3738310164 + ... + 3738343235.

It is an arithmetic number, because the mean of its divisors is an integer number (5299078097250).

Almost surely, 2^{123633940605864} is an apocalyptic number.

It is an amenable number.

123633940605864 is an abundant number, since it is smaller than the sum of its proper divisors (215507057618136).

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

123633940605864 is a wasteful number, since it uses less digits than its factorization.

123633940605864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7476653474 (or 7476653470 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 60.

The spelling of 123633940605864 in words is "one hundred twenty-three trillion, six hundred thirty-three billion, nine hundred forty million, six hundred five thousand, eight hundred sixty-four".