27728745011 has 16 divisors (see below), whose sum is σ = 30776993280. Its totient is φ = 24768816480.

The previous prime is 27728745001. The next prime is 27728745013. The reversal of 27728745011 is 11054782772.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27728745011 - 2⁶ = 27728744947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27728745013) 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, 1520630 + ... + 1538756.

It is an arithmetic number, because the mean of its divisors is an integer number (1923562080).

Almost surely, 2^27728745011 is an apocalyptic number.

27728745011 is a deficient number, since it is larger than the sum of its proper divisors (3048248269).

27728745011 is a wasteful number, since it uses less digits than its factorization.

27728745011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20554.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 27728745011 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, eleven".