631765680163 has 2 divisors, whose sum is σ = 631765680164. Its totient is φ = 631765680162.

The previous prime is 631765680023. The next prime is 631765680223. The reversal of 631765680163 is 361086567136.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631765680163 - 2⁹ = 631765679651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631765680163.

It is not a weakly prime, because it can be changed into another prime (631765680463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315882840081 + 315882840082.

It is an arithmetic number, because the mean of its divisors is an integer number (315882840082).

Almost surely, 2^631765680163 is an apocalyptic number.

631765680163 is a deficient number, since it is larger than the sum of its proper divisors (1).

631765680163 is an equidigital number, since it uses as much as digits as its factorization.

631765680163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 631765680163 in words is "six hundred thirty-one billion, seven hundred sixty-five million, six hundred eighty thousand, one hundred sixty-three".