16868533631 has 2 divisors, whose sum is σ = 16868533632. Its totient is φ = 16868533630.

The previous prime is 16868533579. The next prime is 16868533711. The reversal of 16868533631 is 13633586861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16868533631 - 2¹⁸ = 16868271487 is a prime.

It is a super-2 number, since 2×16868533631² (a number of 21 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 16868533631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16868533931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8434266815 + 8434266816.

It is an arithmetic number, because the mean of its divisors is an integer number (8434266816).

Almost surely, 2^16868533631 is an apocalyptic number.

16868533631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868533631 is an equidigital number, since it uses as much as digits as its factorization.

16868533631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 50.

The spelling of 16868533631 in words is "sixteen billion, eight hundred sixty-eight million, five hundred thirty-three thousand, six hundred thirty-one".