811876342471 has 4 divisors (see below), whose sum is σ = 811915597512. Its totient is φ = 811837087432.

The previous prime is 811876342469. The next prime is 811876342507. The reversal of 811876342471 is 174243678118.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174243678118 = 2 ⋅87121839059.

It is a cyclic number.

It is not a de Polignac number, because 811876342471 - 2¹ = 811876342469 is a prime.

It is a super-3 number, since 3×811876342471³ (a number of 37 digits) contains 333 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 (811876342421) 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, 19596481 + ... + 19637866.

It is an arithmetic number, because the mean of its divisors is an integer number (202978899378).

Almost surely, 2^811876342471 is an apocalyptic number.

811876342471 is a deficient number, since it is larger than the sum of its proper divisors (39255041).

811876342471 is a wasteful number, since it uses less digits than its factorization.

811876342471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39255040.

The product of its digits is 1806336, while the sum is 52.

The spelling of 811876342471 in words is "eight hundred eleven billion, eight hundred seventy-six million, three hundred forty-two thousand, four hundred seventy-one".