217973974119816 has 32 divisors (see below), whose sum is σ = 554171120647200. Its totient is φ = 71426499993600.

The previous prime is 217973974119779. The next prime is 217973974119833. The reversal of 217973974119816 is 618911479379712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76968209785 + ... + 76968212616.

It is an arithmetic number, because the mean of its divisors is an integer number (17317847520225).

Almost surely, 2^{217973974119816} is an apocalyptic number.

It is an amenable number.

217973974119816 is an abundant number, since it is smaller than the sum of its proper divisors (336197146527384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217973974119816 is a wasteful number, since it uses less digits than its factorization.

217973974119816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153936422469 (or 153936422465 counting only the distinct ones).

The product of its digits is 288054144, while the sum is 75.

The spelling of 217973974119816 in words is "two hundred seventeen trillion, nine hundred seventy-three billion, nine hundred seventy-four million, one hundred nineteen thousand, eight hundred sixteen".