115665165493 has 2 divisors, whose sum is σ = 115665165494. Its totient is φ = 115665165492.

The previous prime is 115665165487. The next prime is 115665165521. The reversal of 115665165493 is 394561566511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115506858769 + 158306724 = 339863^2 + 12582^2 .

It is a cyclic number.

It is not a de Polignac number, because 115665165493 - 2²⁵ = 115631611061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115665165493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115665115493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57832582746 + 57832582747.

It is an arithmetic number, because the mean of its divisors is an integer number (57832582747).

Almost surely, 2^115665165493 is an apocalyptic number.

It is an amenable number.

115665165493 is a deficient number, since it is larger than the sum of its proper divisors (1).

115665165493 is an equidigital number, since it uses as much as digits as its factorization.

115665165493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 52.

The spelling of 115665165493 in words is "one hundred fifteen billion, six hundred sixty-five million, one hundred sixty-five thousand, four hundred ninety-three".