27728745051 has 32 divisors (see below), whose sum is σ = 43363161088. Its totient is φ = 15433856640.

The previous prime is 27728745049. The next prime is 27728745071. The reversal of 27728745051 is 15054782772.

It is not a de Polignac number, because 27728745051 - 2¹ = 27728745049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27728745001) by changing a digit.

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, 26865 + ... + 237021.

It is an arithmetic number, because the mean of its divisors is an integer number (1355098784).

Almost surely, 2^27728745051 is an apocalyptic number.

27728745051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27728745051 is a deficient number, since it is larger than the sum of its proper divisors (15634416037).

27728745051 is a wasteful number, since it uses less digits than its factorization.

27728745051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210331.

The product of its (nonzero) digits is 1097600, while the sum is 48.

The spelling of 27728745051 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, fifty-one".