25971315456 has 36 divisors (see below), whose sum is σ = 69121575992. Its totient is φ = 8657104896.

The previous prime is 25971315449. The next prime is 25971315473. The reversal of 25971315456 is 65451317952.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 16907641 + ... + 16909176.

Almost surely, 2^25971315456 is an apocalyptic number.

It is an amenable number.

25971315456 is an abundant number, since it is smaller than the sum of its proper divisors (43150260536).

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

25971315456 is an equidigital number, since it uses as much as digits as its factorization.

25971315456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33816836 (or 33816822 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 48.

The spelling of 25971315456 in words is "twenty-five billion, nine hundred seventy-one million, three hundred fifteen thousand, four hundred fifty-six".