2845330721 has 2 divisors, whose sum is σ = 2845330722. Its totient is φ = 2845330720.

The previous prime is 2845330699. The next prime is 2845330757. The reversal of 2845330721 is 1270335482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2596921600 + 248409121 = 50960^2 + 15761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2845330721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2845330781) 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, 1422665360 + 1422665361.

It is an arithmetic number, because the mean of its divisors is an integer number (1422665361).

Almost surely, 2^2845330721 is an apocalyptic number.

It is an amenable number.

2845330721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2845330721 is an equidigital number, since it uses as much as digits as its factorization.

2845330721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2845330721 is about 53341.6415289218. The cubic root of 2845330721 is about 1417.0252346773.

The spelling of 2845330721 in words is "two billion, eight hundred forty-five million, three hundred thirty thousand, seven hundred twenty-one".