809196065280 has 1120 divisors, whose sum is σ = 3060516400128. Its totient is φ = 204838502400.

The previous prime is 809196065263. The next prime is 809196065291. The reversal of 809196065280 is 82560691908.

It is a happy number.

809196065280 is a `hidden beast` number, since 8 + 0 + 9 + 1 + 9 + 606 + 5 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4107594142 + ... + 4107594338.

Almost surely, 2^809196065280 is an apocalyptic number.

809196065280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809196065280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530258200064).

809196065280 is an abundant number, since it is smaller than the sum of its proper divisors (2251320334848).

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

809196065280 is an equidigital number, since it uses as much as digits as its factorization.

809196065280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 809196065280 in words is "eight hundred nine billion, one hundred ninety-six million, sixty-five thousand, two hundred eighty".