15494025625 has 45 divisors (see below), whose sum is σ = 21020114379. Its totient is φ = 11411868000.

The previous prime is 15494025619. The next prime is 15494025643. The reversal of 15494025625 is 52652049451.

The square root of 15494025625 is 124475.

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

It can be written as a sum of positive squares in 7 ways, for example, as 15303916681 + 190108944 = 123709^2 + 13788^2 .

It is not a de Polignac number, because 15494025625 - 2⁷ = 15494025497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 40454184 + ... + 40454566.

Almost surely, 2^15494025625 is an apocalyptic number.

15494025625 is the 124475-th square number.

15494025625 is the 62238-th centered octagonal number.

It is an amenable number.

15494025625 is a deficient number, since it is larger than the sum of its proper divisors (5526088754).

15494025625 is an frugal number, since it uses more digits than its factorization.

15494025625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 15494025625 in words is "fifteen billion, four hundred ninety-four million, twenty-five thousand, six hundred twenty-five".