6226138881 has 12 divisors (see below), whose sum is σ = 8994997908. Its totient is φ = 4149981024.

The previous prime is 6226138799. The next prime is 6226138901. The reversal of 6226138881 is 1888316226.

6226138881 is a `hidden beast` number, since 6 + 2 + 261 + 388 + 8 + 1 = 666.

6226138881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1286298225 + 4939840656 = 35865^2 + 70284^2 .

It is not a de Polignac number, because 6226138881 - 2¹⁵ = 6226106113 is a prime.

It is a super-2 number, since 2×6226138881² = 77529610730999864322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6226138181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11910 + ... + 112223.

It is an arithmetic number, because the mean of its divisors is an integer number (749583159).

Almost surely, 2^6226138881 is an apocalyptic number.

It is an amenable number.

6226138881 is a deficient number, since it is larger than the sum of its proper divisors (2768859027).

6226138881 is a wasteful number, since it uses less digits than its factorization.

6226138881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129712 (or 129709 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 6226138881 is about 78905.8862253001. The cubic root of 6226138881 is about 1839.6686234723.

The spelling of 6226138881 in words is "six billion, two hundred twenty-six million, one hundred thirty-eight thousand, eight hundred eighty-one".