163531166111 has 4 divisors (see below), whose sum is σ = 167010552672. Its totient is φ = 160051779552.

The previous prime is 163531166087. The next prime is 163531166147. The reversal of 163531166111 is 111661135361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163531166111 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 (163531166191) 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, 1739693210 + ... + 1739693303.

It is an arithmetic number, because the mean of its divisors is an integer number (41752638168).

Almost surely, 2^163531166111 is an apocalyptic number.

163531166111 is a deficient number, since it is larger than the sum of its proper divisors (3479386561).

163531166111 is an equidigital number, since it uses as much as digits as its factorization.

163531166111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479386560.

The product of its digits is 9720, while the sum is 35.

The spelling of 163531166111 in words is "one hundred sixty-three billion, five hundred thirty-one million, one hundred sixty-six thousand, one hundred eleven".