631831785488848 has 40 divisors (see below), whose sum is σ = 1421991442298240. Its totient is φ = 266345951725440.

The previous prime is 631831785488837. The next prime is 631831785488879. The reversal of 631831785488848 is 848884587138136.

It is a super-2 number, since 2×631831785488848² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46240609788 + ... + 46240623451.

It is an arithmetic number, because the mean of its divisors is an integer number (35549786057456).

Almost surely, 2^{631831785488848} is an apocalyptic number.

It is an amenable number.

631831785488848 is an abundant number, since it is smaller than the sum of its proper divisors (790159656809392).

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

631831785488848 is a wasteful number, since it uses less digits than its factorization.

631831785488848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92481233315 (or 92481233309 counting only the distinct ones).

The product of its digits is 7927234560, while the sum is 82.

The spelling of 631831785488848 in words is "six hundred thirty-one trillion, eight hundred thirty-one billion, seven hundred eighty-five million, four hundred eighty-eight thousand, eight hundred forty-eight".