25479009172 has 12 divisors (see below), whose sum is σ = 44595938016. Its totient is φ = 12737312600.

The previous prime is 25479009169. The next prime is 25479009181. The reversal of 25479009172 is 27190097452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521704 + ... + 568447.

It is an arithmetic number, because the mean of its divisors is an integer number (3716328168).

Almost surely, 2^25479009172 is an apocalyptic number.

It is an amenable number.

25479009172 is a deficient number, since it is larger than the sum of its proper divisors (19116928844).

25479009172 is a wasteful number, since it uses less digits than its factorization.

25479009172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095998 (or 1095996 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 25479009172 in words is "twenty-five billion, four hundred seventy-nine million, nine thousand, one hundred seventy-two".