631269975625 has 45 divisors (see below), whose sum is σ = 803520938649. Its totient is φ = 495783600000.

The previous prime is 631269975587. The next prime is 631269975653. The reversal of 631269975625 is 526579962136.

The square root of 631269975625 is 794525.

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

It can be written as a sum of positive squares in 22 ways, for example, as 125743287609 + 505526688016 = 354603^2 + 711004^2 .

It is not a de Polignac number, because 631269975625 - 2¹¹ = 631269973577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 1211650365 + ... + 1211650885.

Almost surely, 2^631269975625 is an apocalyptic number.

631269975625 is the 794525-th square number.

631269975625 is the 397263-rd centered octagonal number.

It is an amenable number.

631269975625 is a deficient number, since it is larger than the sum of its proper divisors (172250963024).

631269975625 is an frugal number, since it uses more digits than its factorization.

631269975625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 587 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 61.

The spelling of 631269975625 in words is "six hundred thirty-one billion, two hundred sixty-nine million, nine hundred seventy-five thousand, six hundred twenty-five".