168352644491 has 2 divisors, whose sum is σ = 168352644492. Its totient is φ = 168352644490.

The previous prime is 168352644469. The next prime is 168352644517. The reversal of 168352644491 is 194446253861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168352644491 is a prime.

It is a super-2 number, since 2×168352644491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168352643491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84176322245 + 84176322246.

It is an arithmetic number, because the mean of its divisors is an integer number (84176322246).

Almost surely, 2^168352644491 is an apocalyptic number.

168352644491 is a deficient number, since it is larger than the sum of its proper divisors (1).

168352644491 is an equidigital number, since it uses as much as digits as its factorization.

168352644491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 53.

The spelling of 168352644491 in words is "one hundred sixty-eight billion, three hundred fifty-two million, six hundred forty-four thousand, four hundred ninety-one".