82704040121699 has 4 divisors (see below), whose sum is σ = 82705431544680. Its totient is φ = 82702648698720.

The previous prime is 82704040121683. The next prime is 82704040121723. The reversal of 82704040121699 is 99612104040728.

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 82704040121699 - 2⁴ = 82704040121683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82704040121699.

It is not an unprimeable number, because it can be changed into a prime (82704040121669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695622329 + ... + 695741210.

It is an arithmetic number, because the mean of its divisors is an integer number (20676357886170).

Almost surely, 2^{82704040121699} is an apocalyptic number.

82704040121699 is a deficient number, since it is larger than the sum of its proper divisors (1391422981).

82704040121699 is a wasteful number, since it uses less digits than its factorization.

82704040121699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391422980.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 82704040121699 in words is "eighty-two trillion, seven hundred four billion, forty million, one hundred twenty-one thousand, six hundred ninety-nine".