163195699991 has 8 divisors (see below), whose sum is σ = 174251425920. Its totient is φ = 152469995832.

The previous prime is 163195699987. The next prime is 163195700027. The reversal of 163195699991 is 199996591361.

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 163195699991 - 2² = 163195699987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163195699921) 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, 82504421 + ... + 82506398.

It is an arithmetic number, because the mean of its divisors is an integer number (21781428240).

Almost surely, 2^163195699991 is an apocalyptic number.

163195699991 is a deficient number, since it is larger than the sum of its proper divisors (11055725929).

163195699991 is a wasteful number, since it uses less digits than its factorization.

163195699991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165010885.

The product of its digits is 31886460, while the sum is 68.

The spelling of 163195699991 in words is "one hundred sixty-three billion, one hundred ninety-five million, six hundred ninety-nine thousand, nine hundred ninety-one".