631662531983 has 16 divisors (see below), whose sum is σ = 726060142080. Its totient is φ = 538306365600.

The previous prime is 631662531949. The next prime is 631662532079. The reversal of 631662531983 is 389135266136.

It is a Cunningham number, because it is equal to 794772²-1.

It is a cyclic number.

It is not a de Polignac number, because 631662531983 - 2²⁰ = 631661483407 is a prime.

It is a super-2 number, since 2×631662531983² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631662531883) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5506628 + ... + 5620166.

It is an arithmetic number, because the mean of its divisors is an integer number (45378758880).

Almost surely, 2^631662531983 is an apocalyptic number.

631662531983 is a deficient number, since it is larger than the sum of its proper divisors (94397610097).

631662531983 is a wasteful number, since it uses less digits than its factorization.

631662531983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118118.

The product of its digits is 4199040, while the sum is 53.

The spelling of 631662531983 in words is "six hundred thirty-one billion, six hundred sixty-two million, five hundred thirty-one thousand, nine hundred eighty-three".