28427657191 has 2 divisors, whose sum is σ = 28427657192. Its totient is φ = 28427657190.

The previous prime is 28427657171. The next prime is 28427657239. The reversal of 28427657191 is 19175672482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28427657191 - 2³³ = 19837722599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28427657161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14213828595 + 14213828596.

It is an arithmetic number, because the mean of its divisors is an integer number (14213828596).

Almost surely, 2^28427657191 is an apocalyptic number.

28427657191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28427657191 is an equidigital number, since it uses as much as digits as its factorization.

28427657191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The spelling of 28427657191 in words is "twenty-eight billion, four hundred twenty-seven million, six hundred fifty-seven thousand, one hundred ninety-one".