25971900964 has 27 divisors (see below), whose sum is σ = 47980191441. Its totient is φ = 12299578560.

The previous prime is 25971900947. The next prime is 25971900973. The reversal of 25971900964 is 46900917952.

The square root of 25971900964 is 161158.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25581443364 + 390457600 = 159942^2 + 19760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6121884 + ... + 6126124.

Almost surely, 2^25971900964 is an apocalyptic number.

25971900964 is the 161158-th square number.

It is an amenable number.

25971900964 is a deficient number, since it is larger than the sum of its proper divisors (22008290477).

25971900964 is an frugal number, since it uses more digits than its factorization.

25971900964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524 (or 4262 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 25971900964 in words is "twenty-five billion, nine hundred seventy-one million, nine hundred thousand, nine hundred sixty-four".