2268604781 has 2 divisors, whose sum is σ = 2268604782. Its totient is φ = 2268604780.

The previous prime is 2268604777. The next prime is 2268604801. The reversal of 2268604781 is 1874068622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2089312681 + 179292100 = 45709^2 + 13390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2268604781 - 2² = 2268604777 is a prime.

It is a super-2 number, since 2×2268604781² = 10293135304752115922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2268604711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1134302390 + 1134302391.

It is an arithmetic number, because the mean of its divisors is an integer number (1134302391).

Almost surely, 2^2268604781 is an apocalyptic number.

It is an amenable number.

2268604781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2268604781 is an equidigital number, since it uses as much as digits as its factorization.

2268604781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 2268604781 is about 47629.8727795908. The cubic root of 2268604781 is about 1313.9725150956.

The spelling of 2268604781 in words is "two billion, two hundred sixty-eight million, six hundred four thousand, seven hundred eighty-one".