189502184689 has 4 divisors (see below), whose sum is σ = 189614119156. Its totient is φ = 189390250224.

The previous prime is 189502184687. The next prime is 189502184699. The reversal of 189502184689 is 986481205981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986481205981 = 457057 ⋅2158333.

It can be written as a sum of positive squares in 2 ways, for example, as 140036866225 + 49465318464 = 374215^2 + 222408^2 .

It is a cyclic number.

It is not a de Polignac number, because 189502184689 - 2¹ = 189502184687 is a prime.

It is a super-2 number, since 2×189502184689² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189502184681) 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, 55964694 + ... + 55968079.

It is an arithmetic number, because the mean of its divisors is an integer number (47403529789).

Almost surely, 2^189502184689 is an apocalyptic number.

It is an amenable number.

189502184689 is a deficient number, since it is larger than the sum of its proper divisors (111934467).

189502184689 is a wasteful number, since it uses less digits than its factorization.

189502184689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111934466.

The product of its (nonzero) digits is 9953280, while the sum is 61.

The spelling of 189502184689 in words is "one hundred eighty-nine billion, five hundred two million, one hundred eighty-four thousand, six hundred eighty-nine".