25656700920 has 64 divisors (see below), whose sum is σ = 81021168000. Its totient is φ = 6481692288.

The previous prime is 25656700877. The next prime is 25656700921. The reversal of 25656700920 is 2900765652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25656700921) 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, 5624190 + ... + 5628749.

It is an arithmetic number, because the mean of its divisors is an integer number (1265955750).

Almost surely, 2^25656700920 is an apocalyptic number.

25656700920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25656700920 is an abundant number, since it is smaller than the sum of its proper divisors (55364467080).

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

25656700920 is a wasteful number, since it uses less digits than its factorization.

25656700920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252972 (or 11252968 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 25656700920 in words is "twenty-five billion, six hundred fifty-six million, seven hundred thousand, nine hundred twenty".