631803977249 has 2 divisors, whose sum is σ = 631803977250. Its totient is φ = 631803977248.

The previous prime is 631803977183. The next prime is 631803977251. The reversal of 631803977249 is 942779308136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401883727249 + 229920250000 = 633943^2 + 479500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631803977249 is a prime.

Together with 631803977251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631803970249) 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, 315901988624 + 315901988625.

It is an arithmetic number, because the mean of its divisors is an integer number (315901988625).

Almost surely, 2^631803977249 is an apocalyptic number.

It is an amenable number.

631803977249 is a deficient number, since it is larger than the sum of its proper divisors (1).

631803977249 is an equidigital number, since it uses as much as digits as its factorization.

631803977249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The spelling of 631803977249 in words is "six hundred thirty-one billion, eight hundred three million, nine hundred seventy-seven thousand, two hundred forty-nine".