631312506449 has 2 divisors, whose sum is σ = 631312506450. Its totient is φ = 631312506448.

The previous prime is 631312506421. The next prime is 631312506457. The reversal of 631312506449 is 944605213136.

631312506449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534899151424 + 96413355025 = 731368^2 + 310505^2 .

It is a cyclic number.

It is not a de Polignac number, because 631312506449 - 2⁸ = 631312506193 is a prime.

It is not a weakly prime, because it can be changed into another prime (631312506479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315656253224 + 315656253225.

It is an arithmetic number, because the mean of its divisors is an integer number (315656253225).

Almost surely, 2^631312506449 is an apocalyptic number.

It is an amenable number.

631312506449 is a deficient number, since it is larger than the sum of its proper divisors (1).

631312506449 is an equidigital number, since it uses as much as digits as its factorization.

631312506449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 631312506449 in words is "six hundred thirty-one billion, three hundred twelve million, five hundred six thousand, four hundred forty-nine".