631622357057 has 2 divisors, whose sum is σ = 631622357058. Its totient is φ = 631622357056.

The previous prime is 631622357029. The next prime is 631622357059. The reversal of 631622357057 is 750753226136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616474655281 + 15147701776 = 785159^2 + 123076^2 .

It is a cyclic number.

It is not a de Polignac number, because 631622357057 - 2²² = 631618162753 is a prime.

Together with 631622357059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631622357059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315811178528 + 315811178529.

It is an arithmetic number, because the mean of its divisors is an integer number (315811178529).

Almost surely, 2^631622357057 is an apocalyptic number.

It is an amenable number.

631622357057 is a deficient number, since it is larger than the sum of its proper divisors (1).

631622357057 is an equidigital number, since it uses as much as digits as its factorization.

631622357057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 47.

The spelling of 631622357057 in words is "six hundred thirty-one billion, six hundred twenty-two million, three hundred fifty-seven thousand, fifty-seven".