163704396816 has 75 divisors (see below), whose sum is σ = 473850180111. Its totient is φ = 54563277024.

The previous prime is 163704396797. The next prime is 163704396859. The reversal of 163704396816 is 618693407361.

It is a happy number.

The square root of 163704396816 is 404604.

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

163704396816 is a `hidden beast` number, since 1 + 63 + 70 + 439 + 6 + 81 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 14560125 + ... + 14571363.

Almost surely, 2^163704396816 is an apocalyptic number.

163704396816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

163704396816 is the 404604-th square number.

It is an amenable number.

163704396816 is an abundant number, since it is smaller than the sum of its proper divisors (310145783295).

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

163704396816 is an frugal number, since it uses more digits than its factorization.

163704396816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22498 (or 11244 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 163704396816 in words is "one hundred sixty-three billion, seven hundred four million, three hundred ninety-six thousand, eight hundred sixteen".