2771118681 has 4 divisors (see below), whose sum is σ = 3694824912. Its totient is φ = 1847412452.

The previous prime is 2771118653. The next prime is 2771118689. The reversal of 2771118681 is 1868111772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2771118681 is a prime.

It is a super-2 number, since 2×2771118681² = 15358197488374359522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2771118689) 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, 461853111 + ... + 461853116.

It is an arithmetic number, because the mean of its divisors is an integer number (923706228).

Almost surely, 2^2771118681 is an apocalyptic number.

It is an amenable number.

2771118681 is a deficient number, since it is larger than the sum of its proper divisors (923706231).

2771118681 is an equidigital number, since it uses as much as digits as its factorization.

2771118681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923706230.

The product of its digits is 37632, while the sum is 42.

The square root of 2771118681 is about 52641.4160238875. The cubic root of 2771118681 is about 1404.5969100705.

The spelling of 2771118681 in words is "two billion, seven hundred seventy-one million, one hundred eighteen thousand, six hundred eighty-one".