631984550456 has 16 divisors (see below), whose sum is σ = 1354252608240. Its totient is φ = 270850521600.

The previous prime is 631984550443. The next prime is 631984550479. The reversal of 631984550456 is 654055489136.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 11285438401 = 631984550456 / (6 + 3 + 1 + 9 + 8 + 4 + 5 + 5 + 0 + 4 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5642719145 + ... + 5642719256.

It is an arithmetic number, because the mean of its divisors is an integer number (84640788015).

Almost surely, 2^631984550456 is an apocalyptic number.

It is an amenable number.

631984550456 is an abundant number, since it is smaller than the sum of its proper divisors (722268057784).

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

631984550456 is a wasteful number, since it uses less digits than its factorization.

631984550456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11285438414 (or 11285438410 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 56.

The spelling of 631984550456 in words is "six hundred thirty-one billion, nine hundred eighty-four million, five hundred fifty thousand, four hundred fifty-six".