819086454859 has 4 divisors (see below), whose sum is σ = 821446934904. Its totient is φ = 816725974816.

The previous prime is 819086454833. The next prime is 819086454869. The reversal of 819086454859 is 958454680918.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 819086454859 - 2⁵ = 819086454827 is a prime.

It is a Smith number, since the sum of its digits (67) 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 junction number, because it is equal to n+sod(n) for n = 819086454794 and 819086454803.

It is not an unprimeable number, because it can be changed into a prime (819086454869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180239502 + ... + 1180240195.

It is an arithmetic number, because the mean of its divisors is an integer number (205361733726).

Almost surely, 2^819086454859 is an apocalyptic number.

819086454859 is a deficient number, since it is larger than the sum of its proper divisors (2360480045).

819086454859 is a wasteful number, since it uses less digits than its factorization.

819086454859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360480044.

The product of its (nonzero) digits is 99532800, while the sum is 67.

The spelling of 819086454859 in words is "eight hundred nineteen billion, eighty-six million, four hundred fifty-four thousand, eight hundred fifty-nine".