2543855845 has 16 divisors (see below), whose sum is σ = 3065832000. Its totient is φ = 2026303488.

The previous prime is 2543855827. The next prime is 2543855861. The reversal of 2543855845 is 5485583452.

It is a cyclic number.

It is not a de Polignac number, because 2543855845 - 2¹³ = 2543847653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610266 + ... + 1611844.

It is an arithmetic number, because the mean of its divisors is an integer number (191614500).

Almost surely, 2^2543855845 is an apocalyptic number.

It is an amenable number.

2543855845 is a deficient number, since it is larger than the sum of its proper divisors (521976155).

2543855845 is a wasteful number, since it uses less digits than its factorization.

2543855845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 3840000, while the sum is 49.

The square root of 2543855845 is about 50436.6518020378. The cubic root of 2543855845 is about 1365.0990540273.

The spelling of 2543855845 in words is "two billion, five hundred forty-three million, eight hundred fifty-five thousand, eight hundred forty-five".