631637958041 has 2 divisors, whose sum is σ = 631637958042. Its totient is φ = 631637958040.

The previous prime is 631637957987. The next prime is 631637958071. The reversal of 631637958041 is 140859736136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631579878400 + 58079641 = 794720^2 + 7621^2 .

It is a cyclic number.

It is not a de Polignac number, because 631637958041 - 2³⁸ = 356760051097 is a prime.

It is not a weakly prime, because it can be changed into another prime (631637958071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315818979020 + 315818979021.

It is an arithmetic number, because the mean of its divisors is an integer number (315818979021).

Almost surely, 2^631637958041 is an apocalyptic number.

It is an amenable number.

631637958041 is a deficient number, since it is larger than the sum of its proper divisors (1).

631637958041 is an equidigital number, since it uses as much as digits as its factorization.

631637958041 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 53.

The spelling of 631637958041 in words is "six hundred thirty-one billion, six hundred thirty-seven million, nine hundred fifty-eight thousand, forty-one".