168314908644 has 81 divisors (see below), whose sum is σ = 430352570011. Its totient is φ = 55467422400.

The previous prime is 168314908627. The next prime is 168314908781. The reversal of 168314908644 is 446809413861.

The square root of 168314908644 is 410262.

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

168314908644 is a `hidden beast` number, since 1 + 6 + 8 + 31 + 490 + 86 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 155795984100 + 12518924544 = 394710^2 + 111888^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 248618434 + ... + 248619110.

Almost surely, 2^168314908644 is an apocalyptic number.

168314908644 is the 410262-nd square number.

It is an amenable number.

168314908644 is an abundant number, since it is smaller than the sum of its proper divisors (262037661367).

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

168314908644 is an equidigital number, since it uses as much as digits as its factorization.

168314908644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 168314908644 in words is "one hundred sixty-eight billion, three hundred fourteen million, nine hundred eight thousand, six hundred forty-four".