2261788591 has 2 divisors, whose sum is σ = 2261788592. Its totient is φ = 2261788590.

The previous prime is 2261788589. The next prime is 2261788597. The reversal of 2261788591 is 1958871622.

It is a happy number.

2261788591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261788591 - 2¹ = 2261788589 is a prime.

Together with 2261788589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261788597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130894295 + 1130894296.

It is an arithmetic number, because the mean of its divisors is an integer number (1130894296).

Almost surely, 2^2261788591 is an apocalyptic number.

2261788591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261788591 is an equidigital number, since it uses as much as digits as its factorization.

2261788591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 2261788591 is about 47558.2652227770. The cubic root of 2261788591 is about 1312.6552192058.

The spelling of 2261788591 in words is "two billion, two hundred sixty-one million, seven hundred eighty-eight thousand, five hundred ninety-one".