189591447241 has 27 divisors (see below), whose sum is σ = 234345575559. Its totient is φ = 152905921728.

The previous prime is 189591447203. The next prime is 189591447259. The reversal of 189591447241 is 142744195981.

The square root of 189591447241 is 435421.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 147605798025 + 41985649216 = 384195^2 + 204904^2 .

It is not a de Polignac number, because 189591447241 - 2⁷ = 189591447113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189591447271) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 51813270 + ... + 51816928.

Almost surely, 2^189591447241 is an apocalyptic number.

189591447241 is the 435421-st square number.

189591447241 is the 217711-st centered octagonal number.

It is an amenable number.

189591447241 is a deficient number, since it is larger than the sum of its proper divisors (44754128318).

189591447241 is an frugal number, since it uses more digits than its factorization.

189591447241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7366 (or 3683 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 189591447241 in words is "one hundred eighty-nine billion, five hundred ninety-one million, four hundred forty-seven thousand, two hundred forty-one".