168493108637 has 16 divisors (see below), whose sum is σ = 198616833792. Its totient is φ = 139916211840.

The previous prime is 168493108607. The next prime is 168493108681. The reversal of 168493108637 is 736801394861.

It is a cyclic number.

It is not a de Polignac number, because 168493108637 - 2²⁴ = 168476331421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168493108607) 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 in 15 ways as a sum of consecutive naturals, for example, 1335689 + ... + 1456382.

It is an arithmetic number, because the mean of its divisors is an integer number (12413552112).

Almost surely, 2^168493108637 is an apocalyptic number.

It is an amenable number.

168493108637 is a deficient number, since it is larger than the sum of its proper divisors (30123725155).

168493108637 is a wasteful number, since it uses less digits than its factorization.

168493108637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792348.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 168493108637 in words is "one hundred sixty-eight billion, four hundred ninety-three million, one hundred eight thousand, six hundred thirty-seven".