2585168421 has 32 divisors (see below), whose sum is σ = 3934420992. Its totient is φ = 1494567360.

The previous prime is 2585168387. The next prime is 2585168447. The reversal of 2585168421 is 1248615852.

It is not a de Polignac number, because 2585168421 - 2⁶ = 2585168357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585168221) 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 31 ways as a sum of consecutive naturals, for example, 286251 + ... + 295143.

It is an arithmetic number, because the mean of its divisors is an integer number (122950656).

Almost surely, 2^2585168421 is an apocalyptic number.

It is an amenable number.

2585168421 is a deficient number, since it is larger than the sum of its proper divisors (1349252571).

2585168421 is a wasteful number, since it uses less digits than its factorization.

2585168421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313.

The product of its digits is 153600, while the sum is 42.

The square root of 2585168421 is about 50844.5515370133. The cubic root of 2585168421 is about 1372.4492073797.

The spelling of 2585168421 in words is "two billion, five hundred eighty-five million, one hundred sixty-eight thousand, four hundred twenty-one".