28491422047189 has 2 divisors, whose sum is σ = 28491422047190. Its totient is φ = 28491422047188.

The previous prime is 28491422047147. The next prime is 28491422047211. The reversal of 28491422047189 is 98174022419482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27927345944689 + 564076102500 = 5284633^2 + 751050^2 .

It is a cyclic number.

It is not a de Polignac number, because 28491422047189 - 2²³ = 28491413658581 is a prime.

It is a super-2 number, since 2×28491422047189² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28491422047129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14245711023594 + 14245711023595.

It is an arithmetic number, because the mean of its divisors is an integer number (14245711023595).

Almost surely, 2^{28491422047189} is an apocalyptic number.

It is an amenable number.

28491422047189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28491422047189 is an equidigital number, since it uses as much as digits as its factorization.

28491422047189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 28491422047189 in words is "twenty-eight trillion, four hundred ninety-one billion, four hundred twenty-two million, forty-seven thousand, one hundred eighty-nine".