27775244545 has 16 divisors (see below), whose sum is σ = 34248709008. Its totient is φ = 21608536320.

The previous prime is 27775244543. The next prime is 27775244579. The reversal of 27775244545 is 54544257772.

It can be written as a sum of positive squares in 8 ways, for example, as 269353744 + 27505890801 = 16412^2 + 165849^2 .

It is not a de Polignac number, because 27775244545 - 2¹ = 27775244543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27775244492 and 27775244501.

It is not an unprimeable number, because it can be changed into a prime (27775244543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331855 + ... + 407035.

It is an arithmetic number, because the mean of its divisors is an integer number (2140544313).

Almost surely, 2^27775244545 is an apocalyptic number.

It is an amenable number.

27775244545 is a deficient number, since it is larger than the sum of its proper divisors (6473464463).

27775244545 is a wasteful number, since it uses less digits than its factorization.

27775244545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77220.

The product of its digits is 10976000, while the sum is 52.

The spelling of 27775244545 in words is "twenty-seven billion, seven hundred seventy-five million, two hundred forty-four thousand, five hundred forty-five".