25130026660 has 24 divisors (see below), whose sum is σ = 52816047480. Its totient is φ = 10043821824.

The previous prime is 25130026657. The next prime is 25130026699. The reversal of 25130026660 is 6662003152.

It can be written as a sum of positive squares in 4 ways, for example, as 18563517504 + 6566509156 = 136248^2 + 81034^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486609 + ... + 535768.

It is an arithmetic number, because the mean of its divisors is an integer number (2200668645).

Almost surely, 2^25130026660 is an apocalyptic number.

25130026660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25130026660 is an abundant number, since it is smaller than the sum of its proper divisors (27686020820).

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

25130026660 is a wasteful number, since it uses less digits than its factorization.

25130026660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023615 (or 1023613 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 25130026660 in words is "twenty-five billion, one hundred thirty million, twenty-six thousand, six hundred sixty".