23155556788 has 24 divisors (see below), whose sum is σ = 49873507712. Its totient is φ = 9160439904.

The previous prime is 23155556779. The next prime is 23155556807. The reversal of 23155556788 is 88765555132.

It is a congruent number.

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, 31806720 + ... + 31807447.

Almost surely, 2^23155556788 is an apocalyptic number.

23155556788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

23155556788 is an abundant number, since it is smaller than the sum of its proper divisors (26717950924).

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

23155556788 is a wasteful number, since it uses less digits than its factorization.

23155556788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63614191 (or 63614189 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 55.

The spelling of 23155556788 in words is "twenty-three billion, one hundred fifty-five million, five hundred fifty-six thousand, seven hundred eighty-eight".