631782460321 has 2 divisors, whose sum is σ = 631782460322. Its totient is φ = 631782460320.

The previous prime is 631782460289. The next prime is 631782460333. The reversal of 631782460321 is 123064287136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607807344400 + 23975115921 = 779620^2 + 154839^2 .

It is a cyclic number.

It is not a de Polignac number, because 631782460321 - 2⁵ = 631782460289 is a prime.

It is not a weakly prime, because it can be changed into another prime (631782460381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315891230160 + 315891230161.

It is an arithmetic number, because the mean of its divisors is an integer number (315891230161).

Almost surely, 2^631782460321 is an apocalyptic number.

It is an amenable number.

631782460321 is a deficient number, since it is larger than the sum of its proper divisors (1).

631782460321 is an equidigital number, since it uses as much as digits as its factorization.

631782460321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 631782460321 in words is "six hundred thirty-one billion, seven hundred eighty-two million, four hundred sixty thousand, three hundred twenty-one".