15636252025 has 27 divisors (see below), whose sum is σ = 19679285863. Its totient is φ = 12324435200.

The previous prime is 15636251923. The next prime is 15636252043. The reversal of 15636252025 is 52025263651.

The square root of 15636252025 is 125045.

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

It can be written as a sum of positive squares in 13 ways, for example, as 12155724009 + 3480528016 = 110253^2 + 58996^2 .

It is not a de Polignac number, because 15636252025 - 2⁹ = 15636251513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 55644885 + ... + 55645165.

Almost surely, 2^15636252025 is an apocalyptic number.

15636252025 is the 125045-th square number.

15636252025 is the 62523-rd centered octagonal number.

It is an amenable number.

15636252025 is a deficient number, since it is larger than the sum of its proper divisors (4043033838).

15636252025 is an frugal number, since it uses more digits than its factorization.

15636252025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 15636252025 in words is "fifteen billion, six hundred thirty-six million, two hundred fifty-two thousand, twenty-five".