631712929991 has 8 divisors (see below), whose sum is σ = 742152253584. Its totient is φ = 530108752320.

The previous prime is 631712929987. The next prime is 631712930027. The reversal of 631712929991 is 199929217136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631712929991 - 2² = 631712929987 is a prime.

It is a super-2 number, since 2×631712929991² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631712929991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631712929901) 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 7 ways as a sum of consecutive naturals, for example, 2208786326 + ... + 2208786611.

It is an arithmetic number, because the mean of its divisors is an integer number (92769031698).

Almost surely, 2^631712929991 is an apocalyptic number.

631712929991 is a deficient number, since it is larger than the sum of its proper divisors (110439323593).

631712929991 is a wasteful number, since it uses less digits than its factorization.

631712929991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417572961.

The product of its digits is 3306744, while the sum is 59.

The spelling of 631712929991 in words is "six hundred thirty-one billion, seven hundred twelve million, nine hundred twenty-nine thousand, nine hundred ninety-one".