25575040660 has 48 divisors (see below), whose sum is σ = 58535842176. Its totient is φ = 9329311872.

The previous prime is 25575040619. The next prime is 25575040681. The reversal of 25575040660 is 6604057552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570984 + ... + 614143.

It is an arithmetic number, because the mean of its divisors is an integer number (1219496712).

Almost surely, 2^25575040660 is an apocalyptic number.

25575040660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25575040660 is an abundant number, since it is smaller than the sum of its proper divisors (32960801516).

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

25575040660 is a wasteful number, since it uses less digits than its factorization.

25575040660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185232 (or 1185230 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 25575040660 in words is "twenty-five billion, five hundred seventy-five million, forty thousand, six hundred sixty".