27728572943 has 2 divisors, whose sum is σ = 27728572944. Its totient is φ = 27728572942.

The previous prime is 27728572931. The next prime is 27728572957. The reversal of 27728572943 is 34927582772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27728572943 - 2²⁰ = 27727524367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27728572903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864286471 + 13864286472.

It is an arithmetic number, because the mean of its divisors is an integer number (13864286472).

Almost surely, 2^27728572943 is an apocalyptic number.

27728572943 is a deficient number, since it is larger than the sum of its proper divisors (1).

27728572943 is an equidigital number, since it uses as much as digits as its factorization.

27728572943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 56.

The spelling of 27728572943 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, nine hundred forty-three".