631806890832 has 100 divisors (see below), whose sum is σ = 1969296530740. Its totient is φ = 194402115072.

The previous prime is 631806890777. The next prime is 631806890861. The reversal of 631806890832 is 238098608136.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 146003466816 + 485803424016 = 382104^2 + 696996^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18733357 + ... + 18767052.

Almost surely, 2^631806890832 is an apocalyptic number.

It is an amenable number.

631806890832 is an abundant number, since it is smaller than the sum of its proper divisors (1337489639908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631806890832 is a wasteful number, since it uses less digits than its factorization.

631806890832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37500442 (or 37500427 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 631806890832 in words is "six hundred thirty-one billion, eight hundred six million, eight hundred ninety thousand, eight hundred thirty-two".