28064462191 has 2 divisors, whose sum is σ = 28064462192. Its totient is φ = 28064462190.

The previous prime is 28064462177. The next prime is 28064462197. The reversal of 28064462191 is 19126446082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28064462191 - 2¹¹ = 28064460143 is a prime.

It is a super-2 number, since 2×28064462191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28064462197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14032231095 + 14032231096.

It is an arithmetic number, because the mean of its divisors is an integer number (14032231096).

Almost surely, 2^28064462191 is an apocalyptic number.

28064462191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28064462191 is an equidigital number, since it uses as much as digits as its factorization.

28064462191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 28064462191 in words is "twenty-eight billion, sixty-four million, four hundred sixty-two thousand, one hundred ninety-one".