811474671381 has 16 divisors (see below), whose sum is σ = 1180603358208. Its totient is φ = 491687596400.

The previous prime is 811474671367. The next prime is 811474671433. The reversal of 811474671381 is 183176474118.

It is not a de Polignac number, because 811474671381 - 2¹⁷ = 811474540309 is a prime.

It is a super-2 number, since 2×811474671381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811474672381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2737791 + ... + 3019676.

It is an arithmetic number, because the mean of its divisors is an integer number (73787709888).

Almost surely, 2^811474671381 is an apocalyptic number.

It is an amenable number.

811474671381 is a deficient number, since it is larger than the sum of its proper divisors (369128686827).

811474671381 is a wasteful number, since it uses less digits than its factorization.

811474671381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761752.

The product of its digits is 903168, while the sum is 51.

The spelling of 811474671381 in words is "eight hundred eleven billion, four hundred seventy-four million, six hundred seventy-one thousand, three hundred eighty-one".