2585161689 has 16 divisors (see below), whose sum is σ = 3768821760. Its totient is φ = 1563186960.

The previous prime is 2585161673. The next prime is 2585161693. The reversal of 2585161689 is 9861615852.

It is not a de Polignac number, because 2585161689 - 2⁴ = 2585161673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2585161609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74737 + ... + 103710.

It is an arithmetic number, because the mean of its divisors is an integer number (235551360).

Almost surely, 2^2585161689 is an apocalyptic number.

It is an amenable number.

2585161689 is a deficient number, since it is larger than the sum of its proper divisors (1183660071).

2585161689 is a wasteful number, since it uses less digits than its factorization.

2585161689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178900.

The product of its digits is 1036800, while the sum is 51.

The square root of 2585161689 is about 50844.4853351865. The cubic root of 2585161689 is about 1372.4480160536.

The spelling of 2585161689 in words is "two billion, five hundred eighty-five million, one hundred sixty-one thousand, six hundred eighty-nine".