27728575545 has 32 divisors (see below), whose sum is σ = 48747202560. Its totient is φ = 13347426240.

The previous prime is 27728575529. The next prime is 27728575583. The reversal of 27728575545 is 54557582772.

It is not a de Polignac number, because 27728575545 - 2⁴ = 27728575529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581569 + ... + 627438.

It is an arithmetic number, because the mean of its divisors is an integer number (1523350080).

Almost surely, 2^27728575545 is an apocalyptic number.

It is an amenable number.

27728575545 is a deficient number, since it is larger than the sum of its proper divisors (21018627015).

27728575545 is a wasteful number, since it uses less digits than its factorization.

27728575545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209165.

The product of its digits is 27440000, while the sum is 57.

The spelling of 27728575545 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-five thousand, five hundred forty-five".