2585147617 has 4 divisors (see below), whose sum is σ = 2784005140. Its totient is φ = 2386290096.

The previous prime is 2585147597. The next prime is 2585147623. The reversal of 2585147617 is 7167415852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198922816 + 2386224801 = 14104^2 + 48849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2585147617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2585147647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99428742 + ... + 99428767.

It is an arithmetic number, because the mean of its divisors is an integer number (696001285).

Almost surely, 2^2585147617 is an apocalyptic number.

It is an amenable number.

2585147617 is a deficient number, since it is larger than the sum of its proper divisors (198857523).

2585147617 is a wasteful number, since it uses less digits than its factorization.

2585147617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198857522.

The product of its digits is 470400, while the sum is 46.

The square root of 2585147617 is about 50844.3469522424. The cubic root of 2585147617 is about 1372.4455258002.

The spelling of 2585147617 in words is "two billion, five hundred eighty-five million, one hundred forty-seven thousand, six hundred seventeen".