15625000025 has 12 divisors (see below), whose sum is σ = 19455401724. Its totient is φ = 12448128000.

The previous prime is 15625000019. The next prime is 15625000049. The reversal of 15625000025 is 52000052651.

It can be written as a sum of positive squares in 6 ways, for example, as 232379536 + 15392620489 = 15244^2 + 124067^2 .

It is not a de Polignac number, because 15625000025 - 2²⁰ = 15623951449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15624999958 and 15625000003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1290656 + ... + 1302705.

It is an arithmetic number, because the mean of its divisors is an integer number (1621283477).

Almost surely, 2^15625000025 is an apocalyptic number.

It is an amenable number.

15625000025 is a deficient number, since it is larger than the sum of its proper divisors (3830401699).

15625000025 is a wasteful number, since it uses less digits than its factorization.

15625000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593612 (or 2593607 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 15625000025 its reverse (52000052651), we get a palindrome (67625052676).

It can be divided in two parts, 156250000 and 25, that multiplied together give a 4-th power (3906250000 = 250⁴).

The spelling of 15625000025 in words is "fifteen billion, six hundred twenty-five million, twenty-five", and thus it is an aban number.