809196604857 has 24 divisors (see below), whose sum is σ = 1199585863944. Its totient is φ = 525422386944.

The previous prime is 809196604847. The next prime is 809196604861. The reversal of 809196604857 is 758406691908.

809196604857 is a `hidden beast` number, since 8 + 0 + 9 + 1 + 96 + 60 + 485 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 444403556496 + 364793048361 = 666636^2 + 603981^2 .

It is not a de Polignac number, because 809196604857 - 2⁴ = 809196604841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809196604794 and 809196604803.

It is not an unprimeable number, because it can be changed into a prime (809196604807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6125998 + ... + 6256695.

It is an arithmetic number, because the mean of its divisors is an integer number (49982744331).

Almost surely, 2^809196604857 is an apocalyptic number.

It is an amenable number.

809196604857 is a deficient number, since it is larger than the sum of its proper divisors (390389259087).

809196604857 is a wasteful number, since it uses less digits than its factorization.

809196604857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382889 (or 12382886 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 809196604857 in words is "eight hundred nine billion, one hundred ninety-six million, six hundred four thousand, eight hundred fifty-seven".