25807562997 has 16 divisors (see below), whose sum is σ = 36768473280. Its totient is φ = 16044417792.

The previous prime is 25807562971. The next prime is 25807563007. The reversal of 25807562997 is 79926570852.

It is not a de Polignac number, because 25807562997 - 2¹¹ = 25807560949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25807562997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25807562917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2315683 + ... + 2326800.

It is an arithmetic number, because the mean of its divisors is an integer number (2298029580).

Almost surely, 2^25807562997 is an apocalyptic number.

It is an amenable number.

25807562997 is a deficient number, since it is larger than the sum of its proper divisors (10960910283).

25807562997 is a wasteful number, since it uses less digits than its factorization.

25807562997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4642612.

The product of its (nonzero) digits is 19051200, while the sum is 60.

The spelling of 25807562997 in words is "twenty-five billion, eight hundred seven million, five hundred sixty-two thousand, nine hundred ninety-seven".