189371665369 has 16 divisors (see below), whose sum is σ = 198301340160. Its totient is φ = 180631313280.

The previous prime is 189371665367. The next prime is 189371665397. The reversal of 189371665369 is 963566173981.

It is a cyclic number.

It is not a de Polignac number, because 189371665369 - 2¹ = 189371665367 is a prime.

It is a super-2 number, since 2×189371665369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189371665369.

It is not an unprimeable number, because it can be changed into a prime (189371665367) 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, 766342 + ... + 982864.

It is an arithmetic number, because the mean of its divisors is an integer number (12393833760).

Almost surely, 2^189371665369 is an apocalyptic number.

It is an amenable number.

189371665369 is a deficient number, since it is larger than the sum of its proper divisors (8929674791).

189371665369 is a wasteful number, since it uses less digits than its factorization.

189371665369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216960.

The product of its digits is 44089920, while the sum is 64.

The spelling of 189371665369 in words is "one hundred eighty-nine billion, three hundred seventy-one million, six hundred sixty-five thousand, three hundred sixty-nine".