2809064985 has 32 divisors (see below), whose sum is σ = 4518409728. Its totient is φ = 1490227200.

The previous prime is 2809064983. The next prime is 2809064987. The reversal of 2809064985 is 5894609082.

It is an interprime number because it is at equal distance from previous prime (2809064983) and next prime (2809064987).

It is not a de Polignac number, because 2809064985 - 2¹ = 2809064983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2809064983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4173609 + ... + 4174281.

It is an arithmetic number, because the mean of its divisors is an integer number (141200304).

Almost surely, 2^2809064985 is an apocalyptic number.

It is an amenable number.

2809064985 is a deficient number, since it is larger than the sum of its proper divisors (1709344743).

2809064985 is a wasteful number, since it uses less digits than its factorization.

2809064985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 2809064985 is about 53000.6130624920. The cubic root of 2809064985 is about 1410.9791473660.

The spelling of 2809064985 in words is "two billion, eight hundred nine million, sixty-four thousand, nine hundred eighty-five".