83386216545581 has 2 divisors, whose sum is σ = 83386216545582. Its totient is φ = 83386216545580.

The previous prime is 83386216545529. The next prime is 83386216545589. The reversal of 83386216545581 is 18554561268338.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47205281772100 + 36180934773481 = 6870610^2 + 6015059^2 .

It is a cyclic number.

It is not a de Polignac number, because 83386216545581 - 2¹⁰ = 83386216544557 is a prime.

It is a super-2 number, since 2×83386216545581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83386216545589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41693108272790 + 41693108272791.

It is an arithmetic number, because the mean of its divisors is an integer number (41693108272791).

Almost surely, 2^{83386216545581} is an apocalyptic number.

It is an amenable number.

83386216545581 is a deficient number, since it is larger than the sum of its proper divisors (1).

83386216545581 is an equidigital number, since it uses as much as digits as its factorization.

83386216545581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888000, while the sum is 65.

The spelling of 83386216545581 in words is "eighty-three trillion, three hundred eighty-six billion, two hundred sixteen million, five hundred forty-five thousand, five hundred eighty-one".