18417159755993 has 2 divisors, whose sum is σ = 18417159755994. Its totient is φ = 18417159755992.

The previous prime is 18417159755989. The next prime is 18417159756007. The reversal of 18417159755993 is 39955795171481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18351867752464 + 65292003529 = 4283908^2 + 255523^2 .

It is a cyclic number.

It is not a de Polignac number, because 18417159755993 - 2² = 18417159755989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18417159755993.

It is not a weakly prime, because it can be changed into another prime (18417159755903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9208579877996 + 9208579877997.

It is an arithmetic number, because the mean of its divisors is an integer number (9208579877997).

Almost surely, 2^{18417159755993} is an apocalyptic number.

It is an amenable number.

18417159755993 is a deficient number, since it is larger than the sum of its proper divisors (1).

18417159755993 is an equidigital number, since it uses as much as digits as its factorization.

18417159755993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652000, while the sum is 74.

The spelling of 18417159755993 in words is "eighteen trillion, four hundred seventeen billion, one hundred fifty-nine million, seven hundred fifty-five thousand, nine hundred ninety-three".