13018668617 has 8 divisors (see below), whose sum is σ = 13237585032. Its totient is φ = 12799929600.

The previous prime is 13018668613. The next prime is 13018668647. The reversal of 13018668617 is 71686681031.

It can be written as a sum of positive squares in 4 ways, for example, as 215972416 + 12802696201 = 14696^2 + 113149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13018668617 - 2² = 13018668613 is a prime.

It is a super-3 number, since 3×13018668617³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13018668613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108017 + ... + 194177.

It is an arithmetic number, because the mean of its divisors is an integer number (1654698129).

Almost surely, 2^13018668617 is an apocalyptic number.

It is an amenable number.

13018668617 is a deficient number, since it is larger than the sum of its proper divisors (218916415).

13018668617 is an equidigital number, since it uses as much as digits as its factorization.

13018668617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88699.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 13018668617 in words is "thirteen billion, eighteen million, six hundred sixty-eight thousand, six hundred seventeen".