631624311457 has 2 divisors, whose sum is σ = 631624311458. Its totient is φ = 631624311456.

The previous prime is 631624311433. The next prime is 631624311481. The reversal of 631624311457 is 754113426136.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (631624311433) and next prime (631624311481).

It can be written as a sum of positive squares in only one way, i.e., 362264349456 + 269359962001 = 601884^2 + 518999^2 .

It is a cyclic number.

It is not a de Polignac number, because 631624311457 - 2¹¹ = 631624309409 is a prime.

It is not a weakly prime, because it can be changed into another prime (631624311557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315812155728 + 315812155729.

It is an arithmetic number, because the mean of its divisors is an integer number (315812155729).

Almost surely, 2^631624311457 is an apocalyptic number.

It is an amenable number.

631624311457 is a deficient number, since it is larger than the sum of its proper divisors (1).

631624311457 is an equidigital number, since it uses as much as digits as its factorization.

631624311457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The spelling of 631624311457 in words is "six hundred thirty-one billion, six hundred twenty-four million, three hundred eleven thousand, four hundred fifty-seven".