25231511320 has 64 divisors (see below), whose sum is σ = 61686604800. Its totient is φ = 9252973440.

The previous prime is 25231511311. The next prime is 25231511321. The reversal of 25231511320 is 2311513252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231511321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511914 + ... + 559033.

It is an arithmetic number, because the mean of its divisors is an integer number (963853200).

Almost surely, 2^25231511320 is an apocalyptic number.

25231511320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25231511320 is an abundant number, since it is smaller than the sum of its proper divisors (36455093480).

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

25231511320 is a wasteful number, since it uses less digits than its factorization.

25231511320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071008 (or 1071004 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 25231511320 in words is "twenty-five billion, two hundred thirty-one million, five hundred eleven thousand, three hundred twenty".