631582759849 has 2 divisors, whose sum is σ = 631582759850. Its totient is φ = 631582759848.

The previous prime is 631582759811. The next prime is 631582759981. The reversal of 631582759849 is 948957285136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631338306624 + 244453225 = 794568^2 + 15635^2 .

It is a cyclic number.

It is not a de Polignac number, because 631582759849 - 2⁹ = 631582759337 is a prime.

It is not a weakly prime, because it can be changed into another prime (631582759349) 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, 315791379924 + 315791379925.

It is an arithmetic number, because the mean of its divisors is an integer number (315791379925).

Almost surely, 2^631582759849 is an apocalyptic number.

It is an amenable number.

631582759849 is a deficient number, since it is larger than the sum of its proper divisors (1).

631582759849 is an equidigital number, since it uses as much as digits as its factorization.

631582759849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130636800, while the sum is 67.

The spelling of 631582759849 in words is "six hundred thirty-one billion, five hundred eighty-two million, seven hundred fifty-nine thousand, eight hundred forty-nine".