2865540009 has 16 divisors (see below), whose sum is σ = 4049151552. Its totient is φ = 1796348928.

The previous prime is 2865539921. The next prime is 2865540017. The reversal of 2865540009 is 9000455682.

It is not a de Polignac number, because 2865540009 - 2⁷ = 2865539881 is a prime.

It is a super-2 number, since 2×2865540009² = 16422639086359440162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2865540079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32257 + ... + 82289.

It is an arithmetic number, because the mean of its divisors is an integer number (253071972).

Almost surely, 2^2865540009 is an apocalyptic number.

It is an amenable number.

2865540009 is a deficient number, since it is larger than the sum of its proper divisors (1183611543).

2865540009 is a wasteful number, since it uses less digits than its factorization.

2865540009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51176.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 2865540009 is about 53530.7389169998. The cubic root of 2865540009 is about 1420.3721845612.

The spelling of 2865540009 in words is "two billion, eight hundred sixty-five million, five hundred forty thousand, nine".