812105488371 has 32 divisors (see below), whose sum is σ = 1160763452928. Its totient is φ = 503720363520.

The previous prime is 812105488367. The next prime is 812105488373. The reversal of 812105488371 is 173884501218.

It is not a de Polignac number, because 812105488371 - 2² = 812105488367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812105488371.

It is not an unprimeable number, because it can be changed into a prime (812105488373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9010651 + ... + 9100331.

It is an arithmetic number, because the mean of its divisors is an integer number (36273857904).

Almost surely, 2^812105488371 is an apocalyptic number.

812105488371 is a deficient number, since it is larger than the sum of its proper divisors (348657964557).

812105488371 is a wasteful number, since it uses less digits than its factorization.

812105488371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93291.

The product of its (nonzero) digits is 430080, while the sum is 48.

Adding to 812105488371 its reverse (173884501218), we get a palindrome (985989989589).

The spelling of 812105488371 in words is "eight hundred twelve billion, one hundred five million, four hundred eighty-eight thousand, three hundred seventy-one".