25570038538 has 96 divisors (see below), whose sum is σ = 48826851840. Its totient is φ = 9911658240.

The previous prime is 25570038523. The next prime is 25570038539. The reversal of 25570038538 is 83583007552.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (25570038539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2773845 + ... + 2783047.

It is an arithmetic number, because the mean of its divisors is an integer number (508613040).

Almost surely, 2^25570038538 is an apocalyptic number.

25570038538 is a deficient number, since it is larger than the sum of its proper divisors (23256813302).

25570038538 is a wasteful number, since it uses less digits than its factorization.

25570038538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9292 (or 9275 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 25570038538 in words is "twenty-five billion, five hundred seventy million, thirty-eight thousand, five hundred thirty-eight".