6445028585 has 16 divisors (see below), whose sum is σ = 8008457040. Its totient is φ = 4973418240.

The previous prime is 6445028543. The next prime is 6445028609. The reversal of 6445028585 is 5858205446.

It can be written as a sum of positive squares in 8 ways, for example, as 402764761 + 6042263824 = 20069^2 + 77732^2 .

It is not a de Polignac number, because 6445028585 - 2¹⁴ = 6445012201 is a prime.

It is a super-2 number, since 2×6445028585² = 83076786922934204450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132899 + ... + 174791.

It is an arithmetic number, because the mean of its divisors is an integer number (500528565).

Almost surely, 2^6445028585 is an apocalyptic number.

It is an amenable number.

6445028585 is a deficient number, since it is larger than the sum of its proper divisors (1563428455).

6445028585 is a wasteful number, since it uses less digits than its factorization.

6445028585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42988.

The product of its (nonzero) digits is 1536000, while the sum is 47.

The square root of 6445028585 is about 80280.9353769623. The cubic root of 6445028585 is about 1860.9796151035.

The spelling of 6445028585 in words is "six billion, four hundred forty-five million, twenty-eight thousand, five hundred eighty-five".