16819083898865 has 8 divisors (see below), whose sum is σ = 20189698574760. Its totient is φ = 13450735188352.

The previous prime is 16819083898831. The next prime is 16819083898873. The reversal of 16819083898865 is 56889838091861.

It can be written as a sum of positive squares in 4 ways, for example, as 1000272018496 + 15818811880369 = 1000136^2 + 3977287^2 .

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 16819083898865 - 2⁶ = 16819083898801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16819083898865.

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, 566475014 + ... + 566504703.

It is an arithmetic number, because the mean of its divisors is an integer number (2523712321845).

Almost surely, 2^{16819083898865} is an apocalyptic number.

It is an amenable number.

16819083898865 is a deficient number, since it is larger than the sum of its proper divisors (3370614675895).

16819083898865 is a wasteful number, since it uses less digits than its factorization.

16819083898865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132982691.

The product of its (nonzero) digits is 1433272320, while the sum is 80.

The spelling of 16819083898865 in words is "sixteen trillion, eight hundred nineteen billion, eighty-three million, eight hundred ninety-eight thousand, eight hundred sixty-five".