25642525032 has 48 divisors (see below), whose sum is σ = 69808379940. Its totient is φ = 8503216128.

The previous prime is 25642525021. The next prime is 25642525049. The reversal of 25642525032 is 23052524652.

25642525032 is a `hidden beast` number, since 2 + 5 + 642 + 5 + 2 + 5 + 0 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20824221636 + 4818303396 = 144306^2 + 69414^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 908763 + ... + 936554.

Almost surely, 2^25642525032 is an apocalyptic number.

It is an amenable number.

25642525032 is an abundant number, since it is smaller than the sum of its proper divisors (44165854908).

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

25642525032 is a wasteful number, since it uses less digits than its factorization.

25642525032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845522 (or 1845515 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 25642525032 in words is "twenty-five billion, six hundred forty-two million, five hundred twenty-five thousand, thirty-two".