8111804415381 has 6 divisors (see below), whose sum is σ = 11717050822230. Its totient is φ = 5407869610248.

The previous prime is 8111804415349. The next prime is 8111804415389. The reversal of 8111804415381 is 1835144081118.

It is a happy number.

8111804415381 is a `hidden beast` number, since 8 + 1 + 1 + 1 + 80 + 441 + 53 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5685406279281 + 2426398136100 = 2384409^2 + 1557690^2 .

It is not a de Polignac number, because 8111804415381 - 2⁵ = 8111804415349 is a prime.

It is a super-2 number, since 2×8111804415381² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8111804415389) 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 5 ways as a sum of consecutive naturals, for example, 450655800846 + ... + 450655800863.

It is an arithmetic number, because the mean of its divisors is an integer number (1952841803705).

Almost surely, 2^{8111804415381} is an apocalyptic number.

It is an amenable number.

8111804415381 is a deficient number, since it is larger than the sum of its proper divisors (3605246406849).

8111804415381 is a wasteful number, since it uses less digits than its factorization.

8111804415381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901311601715 (or 901311601712 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

Adding to 8111804415381 its reverse (1835144081118), we get a palindrome (9946948496499).

The spelling of 8111804415381 in words is "eight trillion, one hundred eleven billion, eight hundred four million, four hundred fifteen thousand, three hundred eighty-one".