168465918916 has 9 divisors (see below), whose sum is σ = 294816794671. Its totient is φ = 84232549012.

The previous prime is 168465918857. The next prime is 168465918919. The reversal of 168465918916 is 619819564861.

The square root of 168465918916 is 410446.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168465918919) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 718281 + ... + 923503.

Almost surely, 2^168465918916 is an apocalyptic number.

168465918916 is the 410446-th square number.

It is an amenable number.

168465918916 is a deficient number, since it is larger than the sum of its proper divisors (126350875755).

168465918916 is an frugal number, since it uses more digits than its factorization.

168465918916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410450 (or 205225 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 64.

Multiplying 168465918916 by its sum of digits (64), we get a square (10781818810624 = 3283568²).

The spelling of 168465918916 in words is "one hundred sixty-eight billion, four hundred sixty-five million, nine hundred eighteen thousand, nine hundred sixteen".