2585781355 has 4 divisors (see below), whose sum is σ = 3102937632. Its totient is φ = 2068625080.

The previous prime is 2585781343. The next prime is 2585781361. The reversal of 2585781355 is 5531875852.

It is a happy number.

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

It is not a de Polignac number, because 2585781355 - 2⁷ = 2585781227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2585781299 and 2585781308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258578131 + ... + 258578140.

It is an arithmetic number, because the mean of its divisors is an integer number (775734408).

Almost surely, 2^2585781355 is an apocalyptic number.

2585781355 is a deficient number, since it is larger than the sum of its proper divisors (517156277).

2585781355 is an equidigital number, since it uses as much as digits as its factorization.

2585781355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517156276.

The product of its digits is 1680000, while the sum is 49.

The square root of 2585781355 is about 50850.5787086047. The cubic root of 2585781355 is about 1372.5576663749.

The spelling of 2585781355 in words is "two billion, five hundred eighty-five million, seven hundred eighty-one thousand, three hundred fifty-five".