25131617772 has 48 divisors (see below), whose sum is σ = 58965090912. Its totient is φ = 8330936320.

The previous prime is 25131617747. The next prime is 25131617789. The reversal of 25131617772 is 27771613152.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970488 + ... + 1983200.

It is an arithmetic number, because the mean of its divisors is an integer number (1228439394).

Almost surely, 2^25131617772 is an apocalyptic number.

It is an amenable number.

25131617772 is an abundant number, since it is smaller than the sum of its proper divisors (33833473140).

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

25131617772 is a wasteful number, since it uses less digits than its factorization.

25131617772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13618 (or 13616 counting only the distinct ones).

The product of its digits is 123480, while the sum is 42.

The spelling of 25131617772 in words is "twenty-five billion, one hundred thirty-one million, six hundred seventeen thousand, seven hundred seventy-two".