27155115881 has 8 divisors (see below), whose sum is σ = 28256148864. Its totient is φ = 26075885680.

The previous prime is 27155115851. The next prime is 27155115907. The reversal of 27155115881 is 18851155172.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27155115881 is a prime.

It is a super-2 number, since 2×27155115881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27155115851) 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 7 ways as a sum of consecutive naturals, for example, 5448155 + ... + 5453136.

It is an arithmetic number, because the mean of its divisors is an integer number (3532018608).

Almost surely, 2^27155115881 is an apocalyptic number.

It is an amenable number.

27155115881 is a deficient number, since it is larger than the sum of its proper divisors (1101032983).

27155115881 is a wasteful number, since it uses less digits than its factorization.

27155115881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901391.

The product of its digits is 112000, while the sum is 44.

The spelling of 27155115881 in words is "twenty-seven billion, one hundred fifty-five million, one hundred fifteen thousand, eight hundred eighty-one".