631809671315 has 32 divisors (see below), whose sum is σ = 774922982400. Its totient is φ = 494404041600.

The previous prime is 631809671249. The next prime is 631809671329. The reversal of 631809671315 is 513176908136.

It is a de Polignac number, because none of the positive numbers 2^k-631809671315 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32063336 + ... + 32083034.

It is an arithmetic number, because the mean of its divisors is an integer number (24216343200).

Almost surely, 2^631809671315 is an apocalyptic number.

631809671315 is a deficient number, since it is larger than the sum of its proper divisors (143113311085).

631809671315 is a wasteful number, since it uses less digits than its factorization.

631809671315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20483.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 631809671315 in words is "six hundred thirty-one billion, eight hundred nine million, six hundred seventy-one thousand, three hundred fifteen".