84220539617 has 2 divisors, whose sum is σ = 84220539618. Its totient is φ = 84220539616.

The previous prime is 84220539581. The next prime is 84220539649. The reversal of 84220539617 is 71693502248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48890074321 + 35330465296 = 221111^2 + 187964^2 .

It is a cyclic number.

It is not a de Polignac number, because 84220539617 - 2³⁶ = 15501062881 is a prime.

It is not a weakly prime, because it can be changed into another prime (84220509617) 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 as a sum of consecutive naturals, namely, 42110269808 + 42110269809.

It is an arithmetic number, because the mean of its divisors is an integer number (42110269809).

It is a 1-persistent number, because it is pandigital, but 2⋅84220539617 = 168441079234 is not.

Almost surely, 2^84220539617 is an apocalyptic number.

It is an amenable number.

84220539617 is a deficient number, since it is larger than the sum of its proper divisors (1).

84220539617 is an equidigital number, since it uses as much as digits as its factorization.

84220539617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 84220539617 in words is "eighty-four billion, two hundred twenty million, five hundred thirty-nine thousand, six hundred seventeen".