631168476121 has 4 divisors (see below), whose sum is σ = 632036659072. Its totient is φ = 630300293172.

The previous prime is 631168476067. The next prime is 631168476181. The reversal of 631168476121 is 121674861136.

631168476121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631168476121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631168476181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434090385 + ... + 434091838.

It is an arithmetic number, because the mean of its divisors is an integer number (158009164768).

Almost surely, 2^631168476121 is an apocalyptic number.

It is an amenable number.

631168476121 is a deficient number, since it is larger than the sum of its proper divisors (868182951).

631168476121 is an equidigital number, since it uses as much as digits as its factorization.

631168476121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868182950.

The product of its digits is 290304, while the sum is 46.

The spelling of 631168476121 in words is "six hundred thirty-one billion, one hundred sixty-eight million, four hundred seventy-six thousand, one hundred twenty-one".