2845125891 has 14 divisors (see below), whose sum is σ = 4265738540. Its totient is φ = 1896750108.

The previous prime is 2845125889. The next prime is 2845125901. The reversal of 2845125891 is 1985215482.

2845125891 is a `hidden beast` number, since 2 + 84 + 512 + 58 + 9 + 1 = 666.

It is not a de Polignac number, because 2845125891 - 2¹ = 2845125889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2845125851) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1950661 + ... + 1952118.

It is an arithmetic number, because the mean of its divisors is an integer number (304695610).

Almost surely, 2^2845125891 is an apocalyptic number.

2845125891 is a deficient number, since it is larger than the sum of its proper divisors (1420612649).

2845125891 is an frugal number, since it uses more digits than its factorization.

2845125891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902797 (or 3902782 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 2845125891 is about 53339.7215122089. The cubic root of 2845125891 is about 1416.9912308687.

The spelling of 2845125891 in words is "two billion, eight hundred forty-five million, one hundred twenty-five thousand, eight hundred ninety-one".