631662531949 has 2 divisors, whose sum is σ = 631662531950. Its totient is φ = 631662531948.

The previous prime is 631662531937. The next prime is 631662532079. The reversal of 631662531949 is 949135266136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631417765924 + 244766025 = 794618^2 + 15645^2 .

It is a cyclic number.

It is not a de Polignac number, because 631662531949 - 2²⁹ = 631125661037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631662531949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631662501949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315831265974 + 315831265975.

It is an arithmetic number, because the mean of its divisors is an integer number (315831265975).

Almost surely, 2^631662531949 is an apocalyptic number.

It is an amenable number.

631662531949 is a deficient number, since it is larger than the sum of its proper divisors (1).

631662531949 is an equidigital number, since it uses as much as digits as its factorization.

631662531949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 55.

It can be divided in two parts, 631662 and 531949, that added together give a palindrome (1163611).

The spelling of 631662531949 in words is "six hundred thirty-one billion, six hundred sixty-two million, five hundred thirty-one thousand, nine hundred forty-nine".