631567676319991 has 8 divisors (see below), whose sum is σ = 634335147362480. Its totient is φ = 628800288178752.

The previous prime is 631567676319967. The next prime is 631567676320001. The reversal of 631567676319991 is 199913676765136.

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 631567676319991 - 2⁷ = 631567676319863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631567676349991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430630 + ... + 35953123.

It is an arithmetic number, because the mean of its divisors is an integer number (79291893420310).

Almost surely, 2^{631567676319991} is an apocalyptic number.

631567676319991 is a deficient number, since it is larger than the sum of its proper divisors (2767471042489).

631567676319991 is a wasteful number, since it uses less digits than its factorization.

631567676319991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41450625.

The product of its digits is 2083248720, while the sum is 79.

The spelling of 631567676319991 in words is "six hundred thirty-one trillion, five hundred sixty-seven billion, six hundred seventy-six million, three hundred nineteen thousand, nine hundred ninety-one".