163401111161 has 4 divisors (see below), whose sum is σ = 163401919824. Its totient is φ = 163400302500.

The previous prime is 163401111127. The next prime is 163401111169. The reversal of 163401111161 is 161111104361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 163401111161 - 2²⁶ = 163334002297 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 163401111161.

It is not an unprimeable number, because it can be changed into a prime (163401111169) 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, 188546 + ... + 601956.

It is an arithmetic number, because the mean of its divisors is an integer number (40850479956).

Almost surely, 2^163401111161 is an apocalyptic number.

It is an amenable number.

163401111161 is a deficient number, since it is larger than the sum of its proper divisors (808663).

163401111161 is an equidigital number, since it uses as much as digits as its factorization.

163401111161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808662.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 163401111161 in words is "one hundred sixty-three billion, four hundred one million, one hundred eleven thousand, one hundred sixty-one".