2261788609 has 2 divisors, whose sum is σ = 2261788610. Its totient is φ = 2261788608.

The previous prime is 2261788597. The next prime is 2261788649. The reversal of 2261788609 is 9068871622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1437926400 + 823862209 = 37920^2 + 28703^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261788609 - 2²¹ = 2259691457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2261788649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130894304 + 1130894305.

It is an arithmetic number, because the mean of its divisors is an integer number (1130894305).

Almost surely, 2^2261788609 is an apocalyptic number.

It is an amenable number.

2261788609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261788609 is an equidigital number, since it uses as much as digits as its factorization.

2261788609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 2261788609 is about 47558.2654120186. The cubic root of 2261788609 is about 1312.6552226880.

The spelling of 2261788609 in words is "two billion, two hundred sixty-one million, seven hundred eighty-eight thousand, six hundred nine".