18318277103617 has 4 divisors (see below), whose sum is σ = 18330579507460. Its totient is φ = 18305974699776.

The previous prime is 18318277103603. The next prime is 18318277103629. The reversal of 18318277103617 is 71630177281381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7088379084801 + 11229898018816 = 2662401^2 + 3351104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18318277103617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18318277101617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6151199688 + ... + 6151202665.

It is an arithmetic number, because the mean of its divisors is an integer number (4582644876865).

Almost surely, 2^{18318277103617} is an apocalyptic number.

It is an amenable number.

18318277103617 is a deficient number, since it is larger than the sum of its proper divisors (12302403843).

18318277103617 is a wasteful number, since it uses less digits than its factorization.

18318277103617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12302403842.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 18318277103617 in words is "eighteen trillion, three hundred eighteen billion, two hundred seventy-seven million, one hundred three thousand, six hundred seventeen".