2585839978 has 16 divisors (see below), whose sum is σ = 4120144704. Its totient is φ = 1212948160.

The previous prime is 2585839973. The next prime is 2585840011. The reversal of 2585839978 is 8799385852.

It is not an unprimeable number, because it can be changed into a prime (2585839973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111700 + ... + 132847.

It is an arithmetic number, because the mean of its divisors is an integer number (257509044).

Almost surely, 2^2585839978 is an apocalyptic number.

2585839978 is a deficient number, since it is larger than the sum of its proper divisors (1534304726).

2585839978 is a wasteful number, since it uses less digits than its factorization.

2585839978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244877.

The product of its digits is 43545600, while the sum is 64.

The square root of 2585839978 is about 50851.1551294560. The cubic root of 2585839978 is about 1372.5680388477.

The spelling of 2585839978 in words is "two billion, five hundred eighty-five million, eight hundred thirty-nine thousand, nine hundred seventy-eight".