2015065643 has 16 divisors (see below), whose sum is σ = 2081116800. Its totient is φ = 1950305280.

The previous prime is 2015065631. The next prime is 2015065649. The reversal of 2015065643 is 3465605102.

It is a cyclic number.

It is not a de Polignac number, because 2015065643 - 2²⁰ = 2014017067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015065649) 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, 1296755 + ... + 1298307.

It is an arithmetic number, because the mean of its divisors is an integer number (130069800).

Almost surely, 2^2015065643 is an apocalyptic number.

2015065643 is a deficient number, since it is larger than the sum of its proper divisors (66051157).

2015065643 is a wasteful number, since it uses less digits than its factorization.

2015065643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 2015065643 is about 44889.4825432417. The cubic root of 2015065643 is about 1263.0767261847.

The spelling of 2015065643 in words is "two billion, fifteen million, sixty-five thousand, six hundred forty-three".