25607698764025 has 27 divisors (see below), whose sum is σ = 36938054431791. Its totient is φ = 17559443417040.

The previous prime is 25607698763993. The next prime is 25607698764031. The reversal of 25607698764025 is 52046789670652.

The square root of 25607698764025 is 5060405.

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., 9218771555049 + 16388927208976 = 3036243^2 + 4048324^2 .

It is not a de Polignac number, because 25607698764025 - 2⁵ = 25607698763993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 177041884 + ... + 177186466.

Almost surely, 2^{25607698764025} is an apocalyptic number.

25607698764025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25607698764025 is the 5060405-th square number.

25607698764025 is the 2530203-rd centered octagonal number.

It is an amenable number.

25607698764025 is a deficient number, since it is larger than the sum of its proper divisors (11330355667766).

25607698764025 is an frugal number, since it uses more digits than its factorization.

25607698764025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289190 (or 144595 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 67.

The spelling of 25607698764025 in words is "twenty-five trillion, six hundred seven billion, six hundred ninety-eight million, seven hundred sixty-four thousand, twenty-five".