25323677631 has 24 divisors (see below), whose sum is σ = 41811962400. Its totient is φ = 14467974336.

The previous prime is 25323677591. The next prime is 25323677633. The reversal of 25323677631 is 13677632352.

25323677631 is a `hidden beast` number, since 2 + 5 + 3 + 2 + 3 + 6 + 7 + 7 + 631 = 666.

It is not a de Polignac number, because 25323677631 - 2¹¹ = 25323675583 is a prime.

It is a super-2 number, since 2×25323677631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25323677633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331645 + ... + 400793.

It is an arithmetic number, because the mean of its divisors is an integer number (1742165100).

Almost surely, 2^25323677631 is an apocalyptic number.

25323677631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25323677631 is a deficient number, since it is larger than the sum of its proper divisors (16488284769).

25323677631 is a wasteful number, since it uses less digits than its factorization.

25323677631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74975 (or 74972 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The spelling of 25323677631 in words is "twenty-five billion, three hundred twenty-three million, six hundred seventy-seven thousand, six hundred thirty-one".