25564057504 has 12 divisors (see below), whose sum is σ = 50329238274. Its totient is φ = 12782028736.

The previous prime is 25564057439. The next prime is 25564057511. The reversal of 25564057504 is 40575046552.

It can be written as a sum of positive squares in only one way, i.e., 20615216400 + 4948841104 = 143580^2 + 70348^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399438367 + ... + 399438430.

Almost surely, 2^25564057504 is an apocalyptic number.

It is an amenable number.

25564057504 is a deficient number, since it is larger than the sum of its proper divisors (24765180770).

25564057504 is an equidigital number, since it uses as much as digits as its factorization.

25564057504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798876807 (or 798876799 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 43.

The spelling of 25564057504 in words is "twenty-five billion, five hundred sixty-four million, fifty-seven thousand, five hundred four".