631648411 has 2 divisors, whose sum is σ = 631648412. Its totient is φ = 631648410.

The previous prime is 631648403. The next prime is 631648421. The reversal of 631648411 is 114846136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631648411 - 2³ = 631648403 is a prime.

It is not a weakly prime, because it can be changed into another prime (631648421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315824205 + 315824206.

It is an arithmetic number, because the mean of its divisors is an integer number (315824206).

Almost surely, 2^631648411 is an apocalyptic number.

631648411 is a deficient number, since it is larger than the sum of its proper divisors (1).

631648411 is an equidigital number, since it uses as much as digits as its factorization.

631648411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 631648411 is about 25132.6164773984. The cubic root of 631648411 is about 858.0089195683.

The spelling of 631648411 in words is "six hundred thirty-one million, six hundred forty-eight thousand, four hundred eleven".