28081646627 has 2 divisors, whose sum is σ = 28081646628. Its totient is φ = 28081646626.

The previous prime is 28081646557. The next prime is 28081646629. The reversal of 28081646627 is 72664618082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28081646627 - 2²⁴ = 28064869411 is a prime.

Together with 28081646629, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28081646629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040823313 + 14040823314.

It is an arithmetic number, because the mean of its divisors is an integer number (14040823314).

Almost surely, 2^28081646627 is an apocalyptic number.

28081646627 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081646627 is an equidigital number, since it uses as much as digits as its factorization.

28081646627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 28081646627 in words is "twenty-eight billion, eighty-one million, six hundred forty-six thousand, six hundred twenty-seven".