6331364659861 has 2 divisors, whose sum is σ = 6331364659862. Its totient is φ = 6331364659860.

The previous prime is 6331364659817. The next prime is 6331364659927. The reversal of 6331364659861 is 1689564631336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5812467740836 + 518896919025 = 2410906^2 + 720345^2 .

It is a cyclic number.

It is not a de Polignac number, because 6331364659861 - 2⁹ = 6331364659349 is a prime.

It is a super-2 number, since 2×6331364659861² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6331364659861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6331364650861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165682329930 + 3165682329931.

It is an arithmetic number, because the mean of its divisors is an integer number (3165682329931).

Almost surely, 2^{6331364659861} is an apocalyptic number.

It is an amenable number.

6331364659861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331364659861 is an equidigital number, since it uses as much as digits as its factorization.

6331364659861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50388480, while the sum is 61.

The spelling of 6331364659861 in words is "six trillion, three hundred thirty-one billion, three hundred sixty-four million, six hundred fifty-nine thousand, eight hundred sixty-one".