17964368865 has 16 divisors (see below), whose sum is σ = 31936656000. Its totient is φ = 9580996656.

The previous prime is 17964368861. The next prime is 17964368887. The reversal of 17964368865 is 56886346971.

It is not a de Polignac number, because 17964368865 - 2² = 17964368861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17964368861) 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, 66534565 + ... + 66534834.

It is an arithmetic number, because the mean of its divisors is an integer number (1996041000).

Almost surely, 2^17964368865 is an apocalyptic number.

17964368865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17964368865 is a deficient number, since it is larger than the sum of its proper divisors (13972287135).

17964368865 is a wasteful number, since it uses less digits than its factorization.

17964368865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133069413 (or 133069407 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 17964368865 in words is "seventeen billion, nine hundred sixty-four million, three hundred sixty-eight thousand, eight hundred sixty-five".