2155586845 has 16 divisors (see below), whose sum is σ = 2610155520. Its totient is φ = 1708905600.

The previous prime is 2155586837. The next prime is 2155586869. The reversal of 2155586845 is 5486855512.

It is not a de Polignac number, because 2155586845 - 2³ = 2155586837 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, 254641 + ... + 262969.

It is an arithmetic number, because the mean of its divisors is an integer number (163134720).

Almost surely, 2^2155586845 is an apocalyptic number.

It is an amenable number.

2155586845 is a deficient number, since it is larger than the sum of its proper divisors (454568675).

2155586845 is a wasteful number, since it uses less digits than its factorization.

2155586845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796.

The product of its digits is 1920000, while the sum is 49.

The square root of 2155586845 is about 46428.2978904030. The cubic root of 2155586845 is about 1291.7798569046.

The spelling of 2155586845 in words is "two billion, one hundred fifty-five million, five hundred eighty-six thousand, eight hundred forty-five".