4857609865 has 8 divisors (see below), whose sum is σ = 5829904008. Its totient is φ = 3885573120.

The previous prime is 4857609857. The next prime is 4857609871. The reversal of 4857609865 is 5689067584.

It can be written as a sum of positive squares in 4 ways, for example, as 1795979641 + 3061630224 = 42379^2 + 55332^2 .

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

It is not a de Polignac number, because 4857609865 - 2³ = 4857609857 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, 20056 + ... + 100585.

It is an arithmetic number, because the mean of its divisors is an integer number (728738001).

Almost surely, 2^4857609865 is an apocalyptic number.

It is an amenable number.

4857609865 is a deficient number, since it is larger than the sum of its proper divisors (972294143).

4857609865 is a wasteful number, since it uses less digits than its factorization.

4857609865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128699.

The product of its (nonzero) digits is 14515200, while the sum is 58.

The square root of 4857609865 is about 69696.5556179070. Note that the first 3 decimals coincide. The cubic root of 4857609865 is about 1693.5871270517.

The spelling of 4857609865 in words is "four billion, eight hundred fifty-seven million, six hundred nine thousand, eight hundred sixty-five".