189591272642 has 18 divisors (see below), whose sum is σ = 286423210899. Its totient is φ = 94121667300.

The previous prime is 189591272641. The next prime is 189591272677. The reversal of 189591272642 is 246272195981.

189591272642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 94795636321 + 94795636321 = 307889^2 + 307889^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307889.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189591272641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 92981459 + ... + 92983497.

Almost surely, 2^189591272642 is an apocalyptic number.

189591272642 is a deficient number, since it is larger than the sum of its proper divisors (96831938257).

189591272642 is an frugal number, since it uses more digits than its factorization.

189591272642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382 (or 2192 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The spelling of 189591272642 in words is "one hundred eighty-nine billion, five hundred ninety-one million, two hundred seventy-two thousand, six hundred forty-two".