2785580811 has 48 divisors (see below), whose sum is σ = 4417489440. Its totient is φ = 1681067520.

The previous prime is 2785580767. The next prime is 2785580867. The reversal of 2785580811 is 1180855872.

It is not a de Polignac number, because 2785580811 - 2¹⁰ = 2785579787 is a prime.

It is a super-2 number, since 2×2785580811² = 15518920909222835442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2785587811) 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 47 ways as a sum of consecutive naturals, for example, 2108031 + ... + 2109351.

It is an arithmetic number, because the mean of its divisors is an integer number (92031030).

Almost surely, 2^2785580811 is an apocalyptic number.

2785580811 is a deficient number, since it is larger than the sum of its proper divisors (1631908629).

2785580811 is a wasteful number, since it uses less digits than its factorization.

2785580811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 45.

The square root of 2785580811 is about 52778.6018287715. The cubic root of 2785580811 is about 1407.0361448731.

The spelling of 2785580811 in words is "two billion, seven hundred eighty-five million, five hundred eighty thousand, eight hundred eleven".