168178729216 has 135 divisors (see below), whose sum is σ = 359411539823. Its totient is φ = 78541585920.

The previous prime is 168178729181. The next prime is 168178729223. The reversal of 168178729216 is 612927871861.

The square root of 168178729216 is 410096.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2368714461 + ... + 2368714531.

Almost surely, 2^168178729216 is an apocalyptic number.

168178729216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

168178729216 is the 410096-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168178729216

168178729216 is an abundant number, since it is smaller than the sum of its proper divisors (191232810607).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168178729216 is an frugal number, since it uses more digits than its factorization.

168178729216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 92 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 58.

The spelling of 168178729216 in words is "one hundred sixty-eight billion, one hundred seventy-eight million, seven hundred twenty-nine thousand, two hundred sixteen".