631672565999 has 2 divisors, whose sum is σ = 631672566000. Its totient is φ = 631672565998.

The previous prime is 631672565947. The next prime is 631672566011. The reversal of 631672565999 is 999565276136.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631672565999 - 2²⁴ = 631655788783 is a prime.

It is a super-2 number, since 2×631672565999² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631672565099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315836282999 + 315836283000.

It is an arithmetic number, because the mean of its divisors is an integer number (315836283000).

Almost surely, 2^631672565999 is an apocalyptic number.

631672565999 is a deficient number, since it is larger than the sum of its proper divisors (1).

631672565999 is an equidigital number, since it uses as much as digits as its factorization.

631672565999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165337200, while the sum is 68.

The spelling of 631672565999 in words is "six hundred thirty-one billion, six hundred seventy-two million, five hundred sixty-five thousand, nine hundred ninety-nine".