25409660972 has 6 divisors (see below), whose sum is σ = 44466906708. Its totient is φ = 12704830484.

The previous prime is 25409660971. The next prime is 25409660981. The reversal of 25409660972 is 27906690452.

It is a self number, because there is not a number n which added to its sum of digits gives 25409660972.

It is not an unprimeable number, because it can be changed into a prime (25409660971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3176207618 + ... + 3176207625.

It is an arithmetic number, because the mean of its divisors is an integer number (7411151118).

Almost surely, 2^25409660972 is an apocalyptic number.

It is an amenable number.

25409660972 is a deficient number, since it is larger than the sum of its proper divisors (19057245736).

25409660972 is a wasteful number, since it uses less digits than its factorization.

25409660972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352415247 (or 6352415245 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 25409660972 in words is "twenty-five billion, four hundred nine million, six hundred sixty thousand, nine hundred seventy-two".