15825136804 has 27 divisors (see below), whose sum is σ = 28630272321. Its totient is φ = 7653550320.

The previous prime is 15825136777. The next prime is 15825136819. The reversal of 15825136804 is 40863152851.

The square root of 15825136804 is 125798.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15700591204 + 124545600 = 125302^2 + 11160^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7798462 + ... + 7800490.

Almost surely, 2^15825136804 is an apocalyptic number.

15825136804 is the 125798-th square number.

It is an amenable number.

15825136804 is a deficient number, since it is larger than the sum of its proper divisors (12805135517).

15825136804 is an frugal number, since it uses more digits than its factorization.

15825136804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 15825136804 in words is "fifteen billion, eight hundred twenty-five million, one hundred thirty-six thousand, eight hundred four".