163995844608 has 108 divisors (see below), whose sum is σ = 473767373898. Its totient is φ = 54664888320.

The previous prime is 163995844549. The next prime is 163995844669. The reversal of 163995844608 is 806448599361.

163995844608 is a `hidden beast` number, since 1 + 6 + 3 + 9 + 9 + 584 + 46 + 0 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 129738276864 + 34257567744 = 360192^2 + 185088^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110138 + ... + 1249158.

Almost surely, 2^163995844608 is an apocalyptic number.

163995844608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163995844608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236883686949).

163995844608 is an abundant number, since it is smaller than the sum of its proper divisors (309771529290).

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

163995844608 is an frugal number, since it uses more digits than its factorization.

163995844608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139061 (or 139026 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 163995844608 in words is "one hundred sixty-three billion, nine hundred ninety-five million, eight hundred forty-four thousand, six hundred eight".