25398264931 has 16 divisors (see below), whose sum is σ = 28343599200. Its totient is φ = 22597360128.

The previous prime is 25398264923. The next prime is 25398264943. The reversal of 25398264931 is 13946289352.

It is a cyclic number.

It is not a de Polignac number, because 25398264931 - 2³ = 25398264923 is a prime.

It is a super-2 number, since 2×25398264931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25398267931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163915 + ... + 278683.

It is an arithmetic number, because the mean of its divisors is an integer number (1771474950).

Almost surely, 2^25398264931 is an apocalyptic number.

25398264931 is a deficient number, since it is larger than the sum of its proper divisors (2945334269).

25398264931 is a wasteful number, since it uses less digits than its factorization.

25398264931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115398.

The product of its digits is 2799360, while the sum is 52.

The spelling of 25398264931 in words is "twenty-five billion, three hundred ninety-eight million, two hundred sixty-four thousand, nine hundred thirty-one".