811284879143 has 4 divisors (see below), whose sum is σ = 817206666720. Its totient is φ = 805363091568.

The previous prime is 811284879131. The next prime is 811284879161. The reversal of 811284879143 is 341978482118.

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 811284879143 - 2³⁴ = 794105009959 is a prime.

It is a super-4 number, since 4×811284879143⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811284879043) 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, 2960893583 + ... + 2960893856.

It is an arithmetic number, because the mean of its divisors is an integer number (204301666680).

Almost surely, 2^811284879143 is an apocalyptic number.

811284879143 is a deficient number, since it is larger than the sum of its proper divisors (5921787577).

811284879143 is a wasteful number, since it uses less digits than its factorization.

811284879143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921787576.

The product of its digits is 3096576, while the sum is 56.

The spelling of 811284879143 in words is "eight hundred eleven billion, two hundred eighty-four million, eight hundred seventy-nine thousand, one hundred forty-three".