631912446021 has 16 divisors (see below), whose sum is σ = 854134789184. Its totient is φ = 415483115904.

The previous prime is 631912446017. The next prime is 631912446089. The reversal of 631912446021 is 120644219136.

It is not a de Polignac number, because 631912446021 - 2² = 631912446017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631912446721) 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, 5124330 + ... + 5246196.

It is an arithmetic number, because the mean of its divisors is an integer number (53383424324).

Almost surely, 2^631912446021 is an apocalyptic number.

It is an amenable number.

631912446021 is a deficient number, since it is larger than the sum of its proper divisors (222222343163).

631912446021 is a wasteful number, since it uses less digits than its factorization.

631912446021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145620.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 631912446021 in words is "six hundred thirty-one billion, nine hundred twelve million, four hundred forty-six thousand, twenty-one".