189477995911 has 4 divisors (see below), whose sum is σ = 189800786952. Its totient is φ = 189155204872.

The previous prime is 189477995899. The next prime is 189477995921. The reversal of 189477995911 is 119599774981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119599774981 = 19 ⋅6294724999.

It is a cyclic number.

It is not a de Polignac number, because 189477995911 - 2¹¹ = 189477993863 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 (189477995921) 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, 161394640 + ... + 161395813.

It is an arithmetic number, because the mean of its divisors is an integer number (47450196738).

Almost surely, 2^189477995911 is an apocalyptic number.

189477995911 is a deficient number, since it is larger than the sum of its proper divisors (322791041).

189477995911 is an equidigital number, since it uses as much as digits as its factorization.

189477995911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322791040.

The product of its digits is 51438240, while the sum is 70.

The spelling of 189477995911 in words is "one hundred eighty-nine billion, four hundred seventy-seven million, nine hundred ninety-five thousand, nine hundred eleven".