23109542856 has 96 divisors (see below), whose sum is σ = 63213696000. Its totient is φ = 7626529152.

The previous prime is 23109542821. The next prime is 23109542879. The reversal of 23109542856 is 65824590132.

23109542856 is a `hidden beast` number, since 2 + 310 + 9 + 54 + 285 + 6 = 666.

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, 3830050 + ... + 3836078.

It is an arithmetic number, because the mean of its divisors is an integer number (658476000).

Almost surely, 2^23109542856 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 23109542856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31606848000).

23109542856 is an abundant number, since it is smaller than the sum of its proper divisors (40104153144).

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

23109542856 is a wasteful number, since it uses less digits than its factorization.

23109542856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563 (or 6556 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 23109542856 in words is "twenty-three billion, one hundred nine million, five hundred forty-two thousand, eight hundred fifty-six".