25634125720 has 32 divisors (see below), whose sum is σ = 65916324000. Its totient is φ = 8788843008.

The previous prime is 25634125703. The next prime is 25634125723. The reversal of 25634125720 is 2752143652.

It is a self number, because there is not a number n which added to its sum of digits gives 25634125720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25634125723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45774945 + ... + 45775504.

It is an arithmetic number, because the mean of its divisors is an integer number (2059885125).

Almost surely, 2^25634125720 is an apocalyptic number.

25634125720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25634125720 is an abundant number, since it is smaller than the sum of its proper divisors (40282198280).

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

25634125720 is a wasteful number, since it uses less digits than its factorization.

25634125720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91550467 (or 91550463 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 25634125720 in words is "twenty-five billion, six hundred thirty-four million, one hundred twenty-five thousand, seven hundred twenty".