189631216191 has 16 divisors (see below), whose sum is σ = 267759496800. Its totient is φ = 118964364288.

The previous prime is 189631216147. The next prime is 189631216193. The reversal of 189631216191 is 191612136981.

It is not a de Polignac number, because 189631216191 - 2³¹ = 187483732543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189631216191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189631216193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886 + ... + 615843.

It is an arithmetic number, because the mean of its divisors is an integer number (16734968550).

Almost surely, 2^189631216191 is an apocalyptic number.

189631216191 is a deficient number, since it is larger than the sum of its proper divisors (78128280609).

189631216191 is a wasteful number, since it uses less digits than its factorization.

189631216191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622778.

The product of its digits is 139968, while the sum is 48.

The spelling of 189631216191 in words is "one hundred eighty-nine billion, six hundred thirty-one million, two hundred sixteen thousand, one hundred ninety-one".