82432138591 has 4 divisors (see below), whose sum is σ = 89925969384. Its totient is φ = 74938307800.

The previous prime is 82432138589. The next prime is 82432138637. The reversal of 82432138591 is 19583123428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82432138591 - 2¹ = 82432138589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82432138501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3746915380 + ... + 3746915401.

It is an arithmetic number, because the mean of its divisors is an integer number (22481492346).

Almost surely, 2^82432138591 is an apocalyptic number.

82432138591 is a deficient number, since it is larger than the sum of its proper divisors (7493830793).

82432138591 is a wasteful number, since it uses less digits than its factorization.

82432138591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7493830792.

The product of its digits is 414720, while the sum is 46.

The spelling of 82432138591 in words is "eighty-two billion, four hundred thirty-two million, one hundred thirty-eight thousand, five hundred ninety-one".