82716559491 has 4 divisors (see below), whose sum is σ = 110288745992. Its totient is φ = 55144372992.

The previous prime is 82716559487. The next prime is 82716559529. The reversal of 82716559491 is 19495561728.

It is a happy number.

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

It is not a de Polignac number, because 82716559491 - 2² = 82716559487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82716559481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13786093246 + ... + 13786093251.

It is an arithmetic number, because the mean of its divisors is an integer number (27572186498).

Almost surely, 2^82716559491 is an apocalyptic number.

82716559491 is a deficient number, since it is larger than the sum of its proper divisors (27572186501).

82716559491 is a wasteful number, since it uses less digits than its factorization.

82716559491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27572186500.

The product of its digits is 5443200, while the sum is 57.

The spelling of 82716559491 in words is "eighty-two billion, seven hundred sixteen million, five hundred fifty-nine thousand, four hundred ninety-one".