168969499631 has 2 divisors, whose sum is σ = 168969499632. Its totient is φ = 168969499630.

The previous prime is 168969499603. The next prime is 168969499711. The reversal of 168969499631 is 136994969861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168969499631 is a prime.

It is a super-2 number, since 2×168969499631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168969499331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84484749815 + 84484749816.

It is an arithmetic number, because the mean of its divisors is an integer number (84484749816).

Almost surely, 2^168969499631 is an apocalyptic number.

168969499631 is a deficient number, since it is larger than the sum of its proper divisors (1).

168969499631 is an equidigital number, since it uses as much as digits as its factorization.

168969499631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136048896, while the sum is 71.

The spelling of 168969499631 in words is "one hundred sixty-eight billion, nine hundred sixty-nine million, four hundred ninety-nine thousand, six hundred thirty-one".