25630669672 has 16 divisors (see below), whose sum is σ = 48715828740. Its totient is φ = 12639782016.

The previous prime is 25630669651. The next prime is 25630669681. The reversal of 25630669672 is 27696603652.

It can be written as a sum of positive squares in 2 ways, for example, as 21789892996 + 3840776676 = 147614^2 + 61974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21943483 + ... + 21944650.

Almost surely, 2^25630669672 is an apocalyptic number.

It is an amenable number.

25630669672 is a deficient number, since it is larger than the sum of its proper divisors (23085159068).

25630669672 is a wasteful number, since it uses less digits than its factorization.

25630669672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43888212 (or 43888208 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 25630669672 in words is "twenty-five billion, six hundred thirty million, six hundred sixty-nine thousand, six hundred seventy-two".