163911311999 has 4 divisors (see below), whose sum is σ = 163912598136. Its totient is φ = 163910025864.

The previous prime is 163911311953. The next prime is 163911312017. The reversal of 163911311999 is 999113119361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163911311999 - 2⁸ = 163911311743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163911311999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163911311099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427904 + ... + 714789.

It is an arithmetic number, because the mean of its divisors is an integer number (40978149534).

Almost surely, 2^163911311999 is an apocalyptic number.

163911311999 is a deficient number, since it is larger than the sum of its proper divisors (1286137).

163911311999 is a wasteful number, since it uses less digits than its factorization.

163911311999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286136.

The product of its digits is 354294, while the sum is 53.

The spelling of 163911311999 in words is "one hundred sixty-three billion, nine hundred eleven million, three hundred eleven thousand, nine hundred ninety-nine".