25531623868 has 24 divisors (see below), whose sum is σ = 44910921440. Its totient is φ = 12700039680.

The previous prime is 25531623857. The next prime is 25531623881. The reversal of 25531623868 is 86832613552.

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, 982993 + ... + 1008631.

Almost surely, 2^25531623868 is an apocalyptic number.

It is an amenable number.

25531623868 is a deficient number, since it is larger than the sum of its proper divisors (19379297572).

25531623868 is a wasteful number, since it uses less digits than its factorization.

25531623868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26917 (or 26915 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 49.

The spelling of 25531623868 in words is "twenty-five billion, five hundred thirty-one million, six hundred twenty-three thousand, eight hundred sixty-eight".