631631659667 has 2 divisors, whose sum is σ = 631631659668. Its totient is φ = 631631659666.

The previous prime is 631631659663. The next prime is 631631659739. The reversal of 631631659667 is 766956136136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631631659667 - 2² = 631631659663 is a prime.

It is not a weakly prime, because it can be changed into another prime (631631659663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315815829833 + 315815829834.

It is an arithmetic number, because the mean of its divisors is an integer number (315815829834).

Almost surely, 2^631631659667 is an apocalyptic number.

631631659667 is a deficient number, since it is larger than the sum of its proper divisors (1).

631631659667 is an equidigital number, since it uses as much as digits as its factorization.

631631659667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 59.

The spelling of 631631659667 in words is "six hundred thirty-one billion, six hundred thirty-one million, six hundred fifty-nine thousand, six hundred sixty-seven".