189031644163 has 4 divisors (see below), whose sum is σ = 195129439168. Its totient is φ = 182933849160.

The previous prime is 189031644097. The next prime is 189031644181. The reversal of 189031644163 is 361446130981.

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-189031644163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189031644563) 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, 3048897456 + ... + 3048897517.

It is an arithmetic number, because the mean of its divisors is an integer number (48782359792).

Almost surely, 2^189031644163 is an apocalyptic number.

189031644163 is a deficient number, since it is larger than the sum of its proper divisors (6097795005).

189031644163 is an equidigital number, since it uses as much as digits as its factorization.

189031644163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097795004.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 189031644163 in words is "one hundred eighty-nine billion, thirty-one million, six hundred forty-four thousand, one hundred sixty-three".