189689841847 has 32 divisors (see below), whose sum is σ = 220244935680. Its totient is φ = 161460679680.

The previous prime is 189689841839. The next prime is 189689841857. The reversal of 189689841847 is 748148986981.

It is not a de Polignac number, because 189689841847 - 2³ = 189689841839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189689841847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189689841857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32662818 + ... + 32668624.

It is an arithmetic number, because the mean of its divisors is an integer number (6882654240).

Almost surely, 2^189689841847 is an apocalyptic number.

189689841847 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

189689841847 is a deficient number, since it is larger than the sum of its proper divisors (30555093833).

189689841847 is a wasteful number, since it uses less digits than its factorization.

189689841847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711.

The product of its digits is 222953472, while the sum is 73.

The spelling of 189689841847 in words is "one hundred eighty-nine billion, six hundred eighty-nine million, eight hundred forty-one thousand, eight hundred forty-seven".