82547790091 has 4 divisors (see below), whose sum is σ = 88897620112. Its totient is φ = 76197960072.

The previous prime is 82547790079. The next prime is 82547790151. The reversal of 82547790091 is 19009774528.

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

It is not a de Polignac number, because 82547790091 - 2⁹ = 82547789579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82547790691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3174914991 + ... + 3174915016.

It is an arithmetic number, because the mean of its divisors is an integer number (22224405028).

Almost surely, 2^82547790091 is an apocalyptic number.

82547790091 is a deficient number, since it is larger than the sum of its proper divisors (6349830021).

82547790091 is a wasteful number, since it uses less digits than its factorization.

82547790091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349830020.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 82547790091 in words is "eighty-two billion, five hundred forty-seven million, seven hundred ninety thousand, ninety-one".