25116390531 has 24 divisors (see below), whose sum is σ = 37177423920. Its totient is φ = 16330003200.

The previous prime is 25116390487. The next prime is 25116390547. The reversal of 25116390531 is 13509361152.

It is a happy number.

25116390531 is a `hidden beast` number, since 2 + 5 + 11 + 639 + 0 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 25116390531 - 2¹¹ = 25116388483 is a prime.

It is a super-2 number, since 2×25116390531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25116392531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1173516 + ... + 1194726.

It is an arithmetic number, because the mean of its divisors is an integer number (1549059330).

Almost surely, 2^25116390531 is an apocalyptic number.

25116390531 is a deficient number, since it is larger than the sum of its proper divisors (12061033389).

25116390531 is a wasteful number, since it uses less digits than its factorization.

25116390531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24467 (or 24464 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The spelling of 25116390531 in words is "twenty-five billion, one hundred sixteen million, three hundred ninety thousand, five hundred thirty-one".