631097863853 has 2 divisors, whose sum is σ = 631097863854. Its totient is φ = 631097863852.

The previous prime is 631097863849. The next prime is 631097863871. The reversal of 631097863853 is 358368790136.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618358904164 + 12738959689 = 786358^2 + 112867^2 .

It is a cyclic number.

It is not a de Polignac number, because 631097863853 - 2² = 631097863849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631097863792 and 631097863801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631097863873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315548931926 + 315548931927.

It is an arithmetic number, because the mean of its divisors is an integer number (315548931927).

Almost surely, 2^631097863853 is an apocalyptic number.

It is an amenable number.

631097863853 is a deficient number, since it is larger than the sum of its proper divisors (1).

631097863853 is an equidigital number, since it uses as much as digits as its factorization.

631097863853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 631097863853 in words is "six hundred thirty-one billion, ninety-seven million, eight hundred sixty-three thousand, eight hundred fifty-three".