25956047565 has 64 divisors (see below), whose sum is σ = 53523333120. Its totient is φ = 11688494400.

The previous prime is 25956047519. The next prime is 25956047569. The reversal of 25956047565 is 56574065952.

25956047565 is a `hidden beast` number, since 2 + 5 + 9 + 560 + 4 + 75 + 6 + 5 = 666.

It is not a de Polignac number, because 25956047565 - 2²¹ = 25953950413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25956047569) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 141661 + ... + 268290.

It is an arithmetic number, because the mean of its divisors is an integer number (836302080).

Almost surely, 2^25956047565 is an apocalyptic number.

It is an amenable number.

25956047565 is an abundant number, since it is smaller than the sum of its proper divisors (27567285555).

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

25956047565 is a wasteful number, since it uses less digits than its factorization.

25956047565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410039 (or 410033 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 54.

The spelling of 25956047565 in words is "twenty-five billion, nine hundred fifty-six million, forty-seven thousand, five hundred sixty-five".