81589432233 has 8 divisors (see below), whose sum is σ = 108849571200. Its totient is φ = 54361124048.

The previous prime is 81589432163. The next prime is 81589432241. The reversal of 81589432233 is 33223498518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81589432233 - 2⁸ = 81589431977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81589432433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7951713 + ... + 7961966.

It is an arithmetic number, because the mean of its divisors is an integer number (13606196400).

Almost surely, 2^81589432233 is an apocalyptic number.

It is an amenable number.

81589432233 is a deficient number, since it is larger than the sum of its proper divisors (27260138967).

81589432233 is a wasteful number, since it uses less digits than its factorization.

81589432233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15915391.

The product of its digits is 1244160, while the sum is 48.

The spelling of 81589432233 in words is "eighty-one billion, five hundred eighty-nine million, four hundred thirty-two thousand, two hundred thirty-three".