189276887691 has 12 divisors (see below), whose sum is σ = 276106880400. Its totient is φ = 124935238800.

The previous prime is 189276887689. The next prime is 189276887837. The reversal of 189276887691 is 196788672981.

It is not a de Polignac number, because 189276887691 - 2¹ = 189276887689 is a prime.

It is a super-2 number, since 2×189276887691² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189276887651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104111791 + ... + 104113608.

It is an arithmetic number, because the mean of its divisors is an integer number (23008906700).

Almost surely, 2^189276887691 is an apocalyptic number.

189276887691 is a deficient number, since it is larger than the sum of its proper divisors (86829992709).

189276887691 is a wasteful number, since it uses less digits than its factorization.

189276887691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208225506 (or 208225503 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 189276887691 in words is "one hundred eighty-nine billion, two hundred seventy-six million, eight hundred eighty-seven thousand, six hundred ninety-one".