5815166881 has 4 divisors (see below), whose sum is σ = 5819962132. Its totient is φ = 5810371632.

The previous prime is 5815166879. The next prime is 5815166941. The reversal of 5815166881 is 1886615185.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1908291856 + 3906875025 = 43684^2 + 62505^2 .

It is a cyclic number.

It is not a de Polignac number, because 5815166881 - 2¹ = 5815166879 is a prime.

It is a super-2 number, since 2×5815166881² = 67632331707758536322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5815166821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395806 + ... + 2398231.

It is an arithmetic number, because the mean of its divisors is an integer number (1454990533).

Almost surely, 2^5815166881 is an apocalyptic number.

It is an amenable number.

5815166881 is a deficient number, since it is larger than the sum of its proper divisors (4795251).

5815166881 is a wasteful number, since it uses less digits than its factorization.

5815166881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795250.

The product of its digits is 460800, while the sum is 49.

The square root of 5815166881 is about 76257.2414987587. The cubic root of 5815166881 is about 1798.2665287682.

The spelling of 5815166881 in words is "five billion, eight hundred fifteen million, one hundred sixty-six thousand, eight hundred eighty-one".