25587434368 has 32 divisors (see below), whose sum is σ = 53657865000. Its totient is φ = 12120362496.

The previous prime is 25587434297. The next prime is 25587434423. The reversal of 25587434368 is 86343478552.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5258143 + ... + 5263006.

Almost surely, 2^25587434368 is an apocalyptic number.

It is an amenable number.

25587434368 is an abundant number, since it is smaller than the sum of its proper divisors (28070430632).

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

25587434368 is a wasteful number, since it uses less digits than its factorization.

25587434368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10521182 (or 10521170 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 55.

The spelling of 25587434368 in words is "twenty-five billion, five hundred eighty-seven million, four hundred thirty-four thousand, three hundred sixty-eight".