25565755660 has 48 divisors (see below), whose sum is σ = 57398193216. Its totient is φ = 9531297792.

The previous prime is 25565755613. The next prime is 25565755667. The reversal of 25565755660 is 6655756552.

It is a junction number, because it is equal to n+sod(n) for n = 25565755598 and 25565755607.

It is not an unprimeable number, because it can be changed into a prime (25565755667) 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, 329997 + ... + 400036.

It is an arithmetic number, because the mean of its divisors is an integer number (1195795692).

Almost surely, 2^25565755660 is an apocalyptic number.

25565755660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25565755660 is an abundant number, since it is smaller than the sum of its proper divisors (31832437556).

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

25565755660 is a wasteful number, since it uses less digits than its factorization.

25565755660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730162 (or 730160 counting only the distinct ones).

The product of its (nonzero) digits is 9450000, while the sum is 52.

The spelling of 25565755660 in words is "twenty-five billion, five hundred sixty-five million, seven hundred fifty-five thousand, six hundred sixty".