631443764929 has 2 divisors, whose sum is σ = 631443764930. Its totient is φ = 631443764928.

The previous prime is 631443764927. The next prime is 631443765019. The reversal of 631443764929 is 929467344136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400275124929 + 231168640000 = 632673^2 + 480800^2 .

It is a cyclic number.

It is not a de Polignac number, because 631443764929 - 2¹ = 631443764927 is a prime.

Together with 631443764927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (631443764927) 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, 315721882464 + 315721882465.

It is an arithmetic number, because the mean of its divisors is an integer number (315721882465).

Almost surely, 2^631443764929 is an apocalyptic number.

It is an amenable number.

631443764929 is a deficient number, since it is larger than the sum of its proper divisors (1).

631443764929 is an equidigital number, since it uses as much as digits as its factorization.

631443764929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 58.

The spelling of 631443764929 in words is "six hundred thirty-one billion, four hundred forty-three million, seven hundred sixty-four thousand, nine hundred twenty-nine".