82644719091 has 16 divisors (see below), whose sum is σ = 120657392640. Its totient is φ = 49901503520.

The previous prime is 82644719089. The next prime is 82644719141. The reversal of 82644719091 is 19091744628.

It is not a de Polignac number, because 82644719091 - 2¹ = 82644719089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82644719041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4646115 + ... + 4663868.

It is an arithmetic number, because the mean of its divisors is an integer number (7541087040).

Almost surely, 2^82644719091 is an apocalyptic number.

82644719091 is a deficient number, since it is larger than the sum of its proper divisors (38012673549).

82644719091 is a wasteful number, since it uses less digits than its factorization.

82644719091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310266.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 82644719091 in words is "eighty-two billion, six hundred forty-four million, seven hundred nineteen thousand, ninety-one".