189406592661 has 36 divisors (see below), whose sum is σ = 300583145184. Its totient is φ = 105961695840.

The previous prime is 189406592657. The next prime is 189406592717. The reversal of 189406592661 is 166295604981.

It is not a de Polignac number, because 189406592661 - 2² = 189406592657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189406592621) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1482385 + ... + 1605078.

Almost surely, 2^189406592661 is an apocalyptic number.

189406592661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

189406592661 is a deficient number, since it is larger than the sum of its proper divisors (111176552523).

189406592661 is a wasteful number, since it uses less digits than its factorization.

189406592661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087514 (or 3087490 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 189406592661 in words is "one hundred eighty-nine billion, four hundred six million, five hundred ninety-two thousand, six hundred sixty-one".