189591272677 has 2 divisors, whose sum is σ = 189591272678. Its totient is φ = 189591272676.

The previous prime is 189591272641. The next prime is 189591272693. The reversal of 189591272677 is 776272195981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157191632676 + 32399640001 = 396474^2 + 179999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189591272677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189591272177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94795636338 + 94795636339.

It is an arithmetic number, because the mean of its divisors is an integer number (94795636339).

Almost surely, 2^189591272677 is an apocalyptic number.

It is an amenable number.

189591272677 is a deficient number, since it is larger than the sum of its proper divisors (1).

189591272677 is an equidigital number, since it uses as much as digits as its factorization.

189591272677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 64.

The spelling of 189591272677 in words is "one hundred eighty-nine billion, five hundred ninety-one million, two hundred seventy-two thousand, six hundred seventy-seven".