123556431066204 has 48 divisors (see below), whose sum is σ = 303473153338880. Its totient is φ = 39017663815680.

The previous prime is 123556431066199. The next prime is 123556431066269. The reversal of 123556431066204 is 402660134655321.

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, 64545789 + ... + 66432459.

Almost surely, 2^{123556431066204} is an apocalyptic number.

It is an amenable number.

123556431066204 is an abundant number, since it is smaller than the sum of its proper divisors (179916722272676).

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

123556431066204 is a wasteful number, since it uses less digits than its factorization.

123556431066204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173930 (or 2173928 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 123556431066204 in words is "one hundred twenty-three trillion, five hundred fifty-six billion, four hundred thirty-one million, sixty-six thousand, two hundred four".