631313881198 has 64 divisors (see below), whose sum is σ = 1271618611200. Its totient is φ = 227017152000.

The previous prime is 631313881171. The next prime is 631313881199. The reversal of 631313881198 is 891188313136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631313881199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21604998 + ... + 21634198.

It is an arithmetic number, because the mean of its divisors is an integer number (19869040800).

Almost surely, 2^631313881198 is an apocalyptic number.

631313881198 is an abundant number, since it is smaller than the sum of its proper divisors (640304730002).

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

631313881198 is a wasteful number, since it uses less digits than its factorization.

631313881198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40033.

The product of its digits is 746496, while the sum is 52.

The spelling of 631313881198 in words is "six hundred thirty-one billion, three hundred thirteen million, eight hundred eighty-one thousand, one hundred ninety-eight".