2745561185 has 4 divisors (see below), whose sum is σ = 3294673428. Its totient is φ = 2196448944.

The previous prime is 2745561163. The next prime is 2745561191. The reversal of 2745561185 is 5811655472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1325251216 + 1420309969 = 36404^2 + 37687^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745561185 - 2²⁰ = 2744512609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274556114 + ... + 274556123.

It is an arithmetic number, because the mean of its divisors is an integer number (823668357).

Almost surely, 2^2745561185 is an apocalyptic number.

It is an amenable number.

2745561185 is a deficient number, since it is larger than the sum of its proper divisors (549112243).

2745561185 is an equidigital number, since it uses as much as digits as its factorization.

2745561185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549112242.

The product of its digits is 336000, while the sum is 44.

The square root of 2745561185 is about 52398.1028759630. The cubic root of 2745561185 is about 1400.2654573159.

The spelling of 2745561185 in words is "two billion, seven hundred forty-five million, five hundred sixty-one thousand, one hundred eighty-five".