811287782119 has 4 divisors (see below), whose sum is σ = 816660549040. Its totient is φ = 805915015200.

The previous prime is 811287782083. The next prime is 811287782143. The reversal of 811287782119 is 911287782118.

It is a happy number.

811287782119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 811287782119 - 2⁷ = 811287781991 is a prime.

It is a super-2 number, since 2×811287782119² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 811287782119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811287782419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686383234 + ... + 2686383535.

It is an arithmetic number, because the mean of its divisors is an integer number (204165137260).

Almost surely, 2^811287782119 is an apocalyptic number.

811287782119 is a deficient number, since it is larger than the sum of its proper divisors (5372766921).

811287782119 is a wasteful number, since it uses less digits than its factorization.

811287782119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372766920.

The product of its digits is 903168, while the sum is 55.

Subtracting 811287782119 from its reverse (911287782118), we obtain a palindrome (99999999999).

The spelling of 811287782119 in words is "eight hundred eleven billion, two hundred eighty-seven million, seven hundred eighty-two thousand, one hundred nineteen".