2585386986 has 64 divisors (see below), whose sum is σ = 6399434496. Its totient is φ = 678067200.

The previous prime is 2585386963. The next prime is 2585387017. The reversal of 2585386986 is 6896835852.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85746 + ... + 111906.

It is an arithmetic number, because the mean of its divisors is an integer number (99991164).

Almost surely, 2^2585386986 is an apocalyptic number.

2585386986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2585386986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3199717248).

2585386986 is an abundant number, since it is smaller than the sum of its proper divisors (3814047510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2585386986 is a wasteful number, since it uses less digits than its factorization.

2585386986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26367.

The product of its digits is 24883200, while the sum is 60.

The square root of 2585386986 is about 50846.7008369275. The cubic root of 2585386986 is about 1372.4878845384.

The spelling of 2585386986 in words is "two billion, five hundred eighty-five million, three hundred eighty-six thousand, nine hundred eighty-six".