83616861917 has 2 divisors, whose sum is σ = 83616861918. Its totient is φ = 83616861916.

The previous prime is 83616861899. The next prime is 83616861947. The reversal of 83616861917 is 71916861638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79651515076 + 3965346841 = 282226^2 + 62971^2 .

It is a cyclic number.

It is not a de Polignac number, because 83616861917 - 2³⁴ = 66436992733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83616861947) 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, 41808430958 + 41808430959.

It is an arithmetic number, because the mean of its divisors is an integer number (41808430959).

Almost surely, 2^83616861917 is an apocalyptic number.

It is an amenable number.

83616861917 is a deficient number, since it is larger than the sum of its proper divisors (1).

83616861917 is an equidigital number, since it uses as much as digits as its factorization.

83616861917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The spelling of 83616861917 in words is "eighty-three billion, six hundred sixteen million, eight hundred sixty-one thousand, nine hundred seventeen".