189865866169 has 8 divisors (see below), whose sum is σ = 216992323008. Its totient is φ = 162740099760.

The previous prime is 189865866143. The next prime is 189865866193. The reversal of 189865866169 is 961668568981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189865866169 - 2¹¹ = 189865864121 is a prime.

It is a super-2 number, since 2×189865866169² (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 (189865866199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734499 + ... + 958759.

It is an arithmetic number, because the mean of its divisors is an integer number (27124040376).

Almost surely, 2^189865866169 is an apocalyptic number.

It is an amenable number.

189865866169 is a deficient number, since it is larger than the sum of its proper divisors (27126456839).

189865866169 is a wasteful number, since it uses less digits than its factorization.

189865866169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345215.

The product of its digits is 268738560, while the sum is 73.

The spelling of 189865866169 in words is "one hundred eighty-nine billion, eight hundred sixty-five million, eight hundred sixty-six thousand, one hundred sixty-nine".