2257764809 has 4 divisors (see below), whose sum is σ = 2262363600. Its totient is φ = 2253166020.

The previous prime is 2257764799. The next prime is 2257764823. The reversal of 2257764809 is 9084677522.

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 not a de Polignac number, because 2257764809 - 2¹⁶ = 2257699273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2257764109) 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 in 3 ways as a sum of consecutive naturals, for example, 2298659 + ... + 2299640.

It is an arithmetic number, because the mean of its divisors is an integer number (565590900).

Almost surely, 2^2257764809 is an apocalyptic number.

It is an amenable number.

2257764809 is a deficient number, since it is larger than the sum of its proper divisors (4598791).

2257764809 is an equidigital number, since it uses as much as digits as its factorization.

2257764809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598790.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 2257764809 is about 47515.9426824303. The cubic root of 2257764809 is about 1311.8763409705.

The spelling of 2257764809 in words is "two billion, two hundred fifty-seven million, seven hundred sixty-four thousand, eight hundred nine".