25699817272 has 32 divisors (see below), whose sum is σ = 49568303520. Its totient is φ = 12482709120.

The previous prime is 25699817237. The next prime is 25699817287. The reversal of 25699817272 is 27271899652.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

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, 117978 + ... + 255574.

It is an arithmetic number, because the mean of its divisors is an integer number (1549009485).

Almost surely, 2^25699817272 is an apocalyptic number.

It is an amenable number.

25699817272 is a deficient number, since it is larger than the sum of its proper divisors (23868486248).

25699817272 is a wasteful number, since it uses less digits than its factorization.

25699817272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138271 (or 138267 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 58.

The spelling of 25699817272 in words is "twenty-five billion, six hundred ninety-nine million, eight hundred seventeen thousand, two hundred seventy-two".