25657949052 has 36 divisors (see below), whose sum is σ = 65452627240. Its totient is φ = 8474183712.

The previous prime is 25657949047. The next prime is 25657949081. The reversal of 25657949052 is 25094975652.

25657949052 is a `hidden beast` number, since 2 + 56 + 57 + 9 + 490 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25657949052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3265438 + ... + 3273285.

Almost surely, 2^25657949052 is an apocalyptic number.

It is an amenable number.

25657949052 is an abundant number, since it is smaller than the sum of its proper divisors (39794678188).

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

25657949052 is a wasteful number, since it uses less digits than its factorization.

25657949052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6538842 (or 6538837 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The spelling of 25657949052 in words is "twenty-five billion, six hundred fifty-seven million, nine hundred forty-nine thousand, fifty-two".