189404040867 has 16 divisors (see below), whose sum is σ = 261766391040. Its totient is φ = 121672840352.

The previous prime is 189404040857. The next prime is 189404040883. The reversal of 189404040867 is 768040404981.

It is a cyclic number.

It is not a de Polignac number, because 189404040867 - 2¹¹ = 189404038819 is a prime.

It is a super-2 number, since 2×189404040867² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (189404040817) 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, 2120313 + ... + 2207834.

It is an arithmetic number, because the mean of its divisors is an integer number (16360399440).

Almost surely, 2^189404040867 is an apocalyptic number.

189404040867 is a deficient number, since it is larger than the sum of its proper divisors (72362350173).

189404040867 is a wasteful number, since it uses less digits than its factorization.

189404040867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328682.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 189404040867 in words is "one hundred eighty-nine billion, four hundred four million, forty thousand, eight hundred sixty-seven".