168911018993 has 8 divisors (see below), whose sum is σ = 173009709600. Its totient is φ = 164853521568.

The previous prime is 168911018923. The next prime is 168911019007. The reversal of 168911018993 is 399810119861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168911018993 - 2²⁴ = 168894241777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168911018923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10289996 + ... + 10306397.

It is an arithmetic number, because the mean of its divisors is an integer number (21626213700).

Almost surely, 2^168911018993 is an apocalyptic number.

It is an amenable number.

168911018993 is a deficient number, since it is larger than the sum of its proper divisors (4098690607).

168911018993 is a wasteful number, since it uses less digits than its factorization.

168911018993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20596591.

The product of its (nonzero) digits is 839808, while the sum is 56.

The spelling of 168911018993 in words is "one hundred sixty-eight billion, nine hundred eleven million, eighteen thousand, nine hundred ninety-three".