25207948731 has 64 divisors (see below), whose sum is σ = 39359139840. Its totient is φ = 14055275520.

The previous prime is 25207948729. The next prime is 25207948741. The reversal of 25207948731 is 13784970252.

It is a happy number.

It is not a de Polignac number, because 25207948731 - 2¹ = 25207948729 is a prime.

It is a super-2 number, since 2×25207948731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25207948741) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79520185 + ... + 79520501.

It is an arithmetic number, because the mean of its divisors is an integer number (614986560).

Almost surely, 2^25207948731 is an apocalyptic number.

25207948731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25207948731 is a deficient number, since it is larger than the sum of its proper divisors (14151191109).

25207948731 is a wasteful number, since it uses less digits than its factorization.

25207948731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 25207948731 in words is "twenty-five billion, two hundred seven million, nine hundred forty-eight thousand, seven hundred thirty-one".