631937670667 has 2 divisors, whose sum is σ = 631937670668. Its totient is φ = 631937670666.

The previous prime is 631937670613. The next prime is 631937670719. The reversal of 631937670667 is 766076739136.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631937670667 is a prime.

It is not a weakly prime, because it can be changed into another prime (631937370667) by changing a digit.

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 as a sum of consecutive naturals, namely, 315968835333 + 315968835334.

It is an arithmetic number, because the mean of its divisors is an integer number (315968835334).

Almost surely, 2^631937670667 is an apocalyptic number.

631937670667 is a deficient number, since it is larger than the sum of its proper divisors (1).

631937670667 is an equidigital number, since it uses as much as digits as its factorization.

631937670667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36006768, while the sum is 61.

The spelling of 631937670667 in words is "six hundred thirty-one billion, nine hundred thirty-seven million, six hundred seventy thousand, six hundred sixty-seven".