23555566788 has 72 divisors (see below), whose sum is σ = 60072915168. Its totient is φ = 7180063488.

The previous prime is 23555566777. The next prime is 23555566799. The reversal of 23555566788 is 88766555532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23555566777) and next prime (23555566799).

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162720 + ... + 271272.

It is an arithmetic number, because the mean of its divisors is an integer number (834346044).

Almost surely, 2^23555566788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23555566788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30036457584).

23555566788 is an abundant number, since it is smaller than the sum of its proper divisors (36517348380).

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

23555566788 is a wasteful number, since it uses less digits than its factorization.

23555566788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108693 (or 108678 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 60.

The spelling of 23555566788 in words is "twenty-three billion, five hundred fifty-five million, five hundred sixty-six thousand, seven hundred eighty-eight".