36568665493 has 2 divisors, whose sum is σ = 36568665494. Its totient is φ = 36568665492.

The previous prime is 36568665491. The next prime is 36568665547. The reversal of 36568665493 is 39456686563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27125101809 + 9443563684 = 164697^2 + 97178^2 .

It is a cyclic number.

It is not a de Polignac number, because 36568665493 - 2¹ = 36568665491 is a prime.

Together with 36568665491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36568665491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18284332746 + 18284332747.

It is an arithmetic number, because the mean of its divisors is an integer number (18284332747).

Almost surely, 2^36568665493 is an apocalyptic number.

It is an amenable number.

36568665493 is a deficient number, since it is larger than the sum of its proper divisors (1).

36568665493 is an equidigital number, since it uses as much as digits as its factorization.

36568665493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83980800, while the sum is 61.

The spelling of 36568665493 in words is "thirty-six billion, five hundred sixty-eight million, six hundred sixty-five thousand, four hundred ninety-three".