5213645065 has 8 divisors (see below), whose sum is σ = 6288791688. Its totient is φ = 4149304320.

The previous prime is 5213645029. The next prime is 5213645077. The reversal of 5213645065 is 5605463125.

It can be written as a sum of positive squares in 4 ways, for example, as 7733961 + 5205911104 = 2781^2 + 72152^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5213645065 - 2⁷ = 5213644937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2700406 + ... + 2702335.

It is an arithmetic number, because the mean of its divisors is an integer number (786098961).

Almost surely, 2^5213645065 is an apocalyptic number.

It is an amenable number.

5213645065 is a deficient number, since it is larger than the sum of its proper divisors (1075146623).

5213645065 is a wasteful number, since it uses less digits than its factorization.

5213645065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402939.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 5213645065 is about 72205.5750271404. The cubic root of 5213645065 is about 1733.9922575125.

The spelling of 5213645065 in words is "five billion, two hundred thirteen million, six hundred forty-five thousand, sixty-five".