2868661181 has 2 divisors, whose sum is σ = 2868661182. Its totient is φ = 2868661180.

The previous prime is 2868661157. The next prime is 2868661247. The reversal of 2868661181 is 1811668682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2158438681 + 710222500 = 46459^2 + 26650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2868661181 is a prime.

It is a super-2 number, since 2×2868661181² = 16458433942752629522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2868661151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1434330590 + 1434330591.

It is an arithmetic number, because the mean of its divisors is an integer number (1434330591).

Almost surely, 2^2868661181 is an apocalyptic number.

It is an amenable number.

2868661181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2868661181 is an equidigital number, since it uses as much as digits as its factorization.

2868661181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 47.

The square root of 2868661181 is about 53559.8840644750. The cubic root of 2868661181 is about 1420.8876915025.

The spelling of 2868661181 in words is "two billion, eight hundred sixty-eight million, six hundred sixty-one thousand, one hundred eighty-one".