631938195008 has 56 divisors (see below), whose sum is σ = 1310918050752. Its totient is φ = 301678401024.

The previous prime is 631938194977. The next prime is 631938195013. The reversal of 631938195008 is 800591839136.

It is a super-2 number, since 2×631938195008² (a number of 24 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 412766 + ... + 1197602.

Almost surely, 2^631938195008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631938195008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655459025376).

631938195008 is an abundant number, since it is smaller than the sum of its proper divisors (678979855744).

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

631938195008 is a wasteful number, since it uses less digits than its factorization.

631938195008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785419 (or 785409 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 631938195008 in words is "six hundred thirty-one billion, nine hundred thirty-eight million, one hundred ninety-five thousand, eight".