25121505604 has 12 divisors (see below), whose sum is σ = 47344376044. Its totient is φ = 11594541024.

The previous prime is 25121505583. The next prime is 25121505667. The reversal of 25121505604 is 40650512152.

It can be written as a sum of positive squares in 2 ways, for example, as 6209755204 + 18911750400 = 78802^2 + 137520^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241552887 + ... + 241552990.

Almost surely, 2^25121505604 is an apocalyptic number.

It is an amenable number.

25121505604 is a deficient number, since it is larger than the sum of its proper divisors (22222870440).

25121505604 is a wasteful number, since it uses less digits than its factorization.

25121505604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483105894 (or 483105892 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 25121505604 in words is "twenty-five billion, one hundred twenty-one million, five hundred five thousand, six hundred four".