631861058421 has 8 divisors (see below), whose sum is σ = 936090456960. Its totient is φ = 421240705596.

The previous prime is 631861058371. The next prime is 631861058501. The reversal of 631861058421 is 124850168136.

631861058421 is a `hidden beast` number, since 6 + 3 + 1 + 8 + 61 + 0 + 584 + 2 + 1 = 666.

It is not a de Polignac number, because 631861058421 - 2⁶ = 631861058357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631861058821) 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 7 ways as a sum of consecutive naturals, for example, 11701130685 + ... + 11701130738.

It is an arithmetic number, because the mean of its divisors is an integer number (117011307120).

Almost surely, 2^631861058421 is an apocalyptic number.

It is an amenable number.

631861058421 is a deficient number, since it is larger than the sum of its proper divisors (304229398539).

631861058421 is a wasteful number, since it uses less digits than its factorization.

631861058421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23402261432 (or 23402261426 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 631861058421 in words is "six hundred thirty-one billion, eight hundred sixty-one million, fifty-eight thousand, four hundred twenty-one".