123556505225628 has 24 divisors (see below), whose sum is σ = 288299524132480. Its totient is φ = 41185357179120.

The previous prime is 123556505225627. The next prime is 123556505225683. The reversal of 123556505225628 is 826522505655321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123556505225627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14480608 + ... + 21372903.

Almost surely, 2^{123556505225628} is an apocalyptic number.

It is an amenable number.

123556505225628 is an abundant number, since it is smaller than the sum of its proper divisors (164743018906852).

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

123556505225628 is a wasteful number, since it uses less digits than its factorization.

123556505225628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36140697 (or 36140695 counting only the distinct ones).

The product of its (nonzero) digits is 43200000, while the sum is 57.

The spelling of 123556505225628 in words is "one hundred twenty-three trillion, five hundred fifty-six billion, five hundred five million, two hundred twenty-five thousand, six hundred twenty-eight".