15456979025 has 24 divisors (see below), whose sum is σ = 19421521080. Its totient is φ = 12202122240.

The previous prime is 15456979001. The next prime is 15456979051. The reversal of 15456979025 is 52097965451.

It can be written as a sum of positive squares in 12 ways, for example, as 1824314944 + 13632664081 = 42712^2 + 116759^2 .

It is not a de Polignac number, because 15456979025 - 2¹⁰ = 15456978001 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 634979 + ... + 658871.

It is an arithmetic number, because the mean of its divisors is an integer number (809230045).

Almost surely, 2^15456979025 is an apocalyptic number.

It is an amenable number.

15456979025 is a deficient number, since it is larger than the sum of its proper divisors (3964542055).

15456979025 is a wasteful number, since it uses less digits than its factorization.

15456979025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24245 (or 24240 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 53.

The spelling of 15456979025 in words is "fifteen billion, four hundred fifty-six million, nine hundred seventy-nine thousand, twenty-five".