17949647117 has 16 divisors (see below), whose sum is σ = 18348211200. Its totient is φ = 17555868720.

The previous prime is 17949647069. The next prime is 17949647119. The reversal of 17949647117 is 71174694971.

It is a cyclic number.

It is not a de Polignac number, because 17949647117 - 2⁸ = 17949646861 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17949647119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7646738 + ... + 7649084.

It is an arithmetic number, because the mean of its divisors is an integer number (1146763200).

Almost surely, 2^17949647117 is an apocalyptic number.

It is an amenable number.

17949647117 is a deficient number, since it is larger than the sum of its proper divisors (398564083).

17949647117 is a wasteful number, since it uses less digits than its factorization.

17949647117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296.

The product of its digits is 2667168, while the sum is 56.

It can be divided in two parts, 1794964 and 7117, that added together give a palindrome (1802081).

The spelling of 17949647117 in words is "seventeen billion, nine hundred forty-nine million, six hundred forty-seven thousand, one hundred seventeen".