82518161893 has 2 divisors, whose sum is σ = 82518161894. Its totient is φ = 82518161892.

The previous prime is 82518161879. The next prime is 82518161897. The reversal of 82518161893 is 39816181528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78636498084 + 3881663809 = 280422^2 + 62303^2 .

It is a cyclic number.

It is not a de Polignac number, because 82518161893 - 2⁵ = 82518161861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82518161893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82518161897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41259080946 + 41259080947.

It is an arithmetic number, because the mean of its divisors is an integer number (41259080947).

Almost surely, 2^82518161893 is an apocalyptic number.

It is an amenable number.

82518161893 is a deficient number, since it is larger than the sum of its proper divisors (1).

82518161893 is an equidigital number, since it uses as much as digits as its factorization.

82518161893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 52.

The spelling of 82518161893 in words is "eighty-two billion, five hundred eighteen million, one hundred sixty-one thousand, eight hundred ninety-three".