25558552536 has 32 divisors (see below), whose sum is σ = 69705144000. Its totient is φ = 7745015840.

The previous prime is 25558552529. The next prime is 25558552603. The reversal of 25558552536 is 63525585552.

It is a congruent number.

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, 48406086 + ... + 48406613.

It is an arithmetic number, because the mean of its divisors is an integer number (2178285750).

Almost surely, 2^25558552536 is an apocalyptic number.

It is an amenable number.

25558552536 is an abundant number, since it is smaller than the sum of its proper divisors (44146591464).

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

25558552536 is a wasteful number, since it uses less digits than its factorization.

25558552536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96812719 (or 96812715 counting only the distinct ones).

The product of its digits is 9000000, while the sum is 51.

The spelling of 25558552536 in words is "twenty-five billion, five hundred fifty-eight million, five hundred fifty-two thousand, five hundred thirty-six".