15626890625 has 14 divisors (see below), whose sum is σ = 19533382782. Its totient is φ = 12501500000.

The previous prime is 15626890619. The next prime is 15626890633. The reversal of 15626890625 is 52609862651.

It can be written as a sum of positive squares in 7 ways, for example, as 13802490256 + 1824400369 = 117484^2 + 42713^2 .

It is not a de Polignac number, because 15626890625 - 2⁶ = 15626890561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 484436 + ... + 515685.

Almost surely, 2^15626890625 is an apocalyptic number.

It is an amenable number.

15626890625 is a deficient number, since it is larger than the sum of its proper divisors (3906492157).

15626890625 is an frugal number, since it uses more digits than its factorization.

15626890625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000151 (or 1000126 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 15626890625 in words is "fifteen billion, six hundred twenty-six million, eight hundred ninety thousand, six hundred twenty-five".