2585878721 has 8 divisors (see below), whose sum is σ = 2745220320. Its totient is φ = 2427340608.

The previous prime is 2585878709. The next prime is 2585878723. The reversal of 2585878721 is 1278785852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2585878721 - 2³⁰ = 1512136897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2585878723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194231 + ... + 207116.

It is an arithmetic number, because the mean of its divisors is an integer number (343152540).

Almost surely, 2^2585878721 is an apocalyptic number.

It is an amenable number.

2585878721 is a deficient number, since it is larger than the sum of its proper divisors (159341599).

2585878721 is a wasteful number, since it uses less digits than its factorization.

2585878721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401743.

The product of its digits is 2508800, while the sum is 53.

The square root of 2585878721 is about 50851.5360731611. The cubic root of 2585878721 is about 1372.5748937624.

The spelling of 2585878721 in words is "two billion, five hundred eighty-five million, eight hundred seventy-eight thousand, seven hundred twenty-one".