84717408817 has 4 divisors (see below), whose sum is σ = 85023248116. Its totient is φ = 84411569520.

The previous prime is 84717408803. The next prime is 84717408821. The reversal of 84717408817 is 71880471748.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45467459361 + 39249949456 = 213231^2 + 198116^2 .

It is a cyclic number.

It is not a de Polignac number, because 84717408817 - 2¹⁵ = 84717376049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84717408877) 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, 152919234 + ... + 152919787.

It is an arithmetic number, because the mean of its divisors is an integer number (21255812029).

Almost surely, 2^84717408817 is an apocalyptic number.

It is an amenable number.

84717408817 is a deficient number, since it is larger than the sum of its proper divisors (305839299).

84717408817 is a wasteful number, since it uses less digits than its factorization.

84717408817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305839298.

The product of its (nonzero) digits is 2809856, while the sum is 55.

The spelling of 84717408817 in words is "eighty-four billion, seven hundred seventeen million, four hundred eight thousand, eight hundred seventeen".