163959991008 has 480 divisors, whose sum is σ = 504937359360. Its totient is φ = 46510464000.

The previous prime is 163959990919. The next prime is 163959991031. The reversal of 163959991008 is 800199959361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2309295613 + ... + 2309295683.

It is an arithmetic number, because the mean of its divisors is an integer number (1051952832).

Almost surely, 2^163959991008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163959991008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252468679680).

163959991008 is an abundant number, since it is smaller than the sum of its proper divisors (340977368352).

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

163959991008 is an equidigital number, since it uses as much as digits as its factorization.

163959991008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 60.

The spelling of 163959991008 in words is "one hundred sixty-three billion, nine hundred fifty-nine million, nine hundred ninety-one thousand, eight".