631513123684 has 27 divisors (see below), whose sum is σ = 1120700260953. Its totient is φ = 311373912672.

The previous prime is 631513123669. The next prime is 631513123693. The reversal of 631513123684 is 486321315136.

The square root of 631513123684 is 794678.

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

It can be written as a sum of positive squares in only one way, i.e., 358477612900 + 273035510784 = 598730^2 + 522528^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631513123684.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 116020267 + ... + 116025709.

Almost surely, 2^631513123684 is an apocalyptic number.

631513123684 is the 794678-th square number.

It is an amenable number.

631513123684 is a deficient number, since it is larger than the sum of its proper divisors (489187137269).

631513123684 is an frugal number, since it uses more digits than its factorization.

631513123684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036 (or 5518 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The spelling of 631513123684 in words is "six hundred thirty-one billion, five hundred thirteen million, one hundred twenty-three thousand, six hundred eighty-four".