16917998564085 has 16 divisors (see below), whose sum is σ = 27472809610176. Its totient is φ = 8888261931648.

The previous prime is 16917998564069. The next prime is 16917998564087. The reversal of 16917998564085 is 58046589971961.

It is not a de Polignac number, because 16917998564085 - 2⁴ = 16917998564069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16917998564085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16917998564087) 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, 8416913704 + ... + 8416915713.

It is an arithmetic number, because the mean of its divisors is an integer number (1717050600636).

Almost surely, 2^{16917998564085} is an apocalyptic number.

16917998564085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16917998564085 is a deficient number, since it is larger than the sum of its proper divisors (10554811046091).

16917998564085 is a wasteful number, since it uses less digits than its factorization.

16917998564085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16833829492.

The product of its (nonzero) digits is 1175731200, while the sum is 78.

The spelling of 16917998564085 in words is "sixteen trillion, nine hundred seventeen billion, nine hundred ninety-eight million, five hundred sixty-four thousand, eighty-five".