28080185461 has 2 divisors, whose sum is σ = 28080185462. Its totient is φ = 28080185460.

The previous prime is 28080185333. The next prime is 28080185501. The reversal of 28080185461 is 16458108082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27600838225 + 479347236 = 166135^2 + 21894^2 .

It is a cyclic number.

It is not a de Polignac number, because 28080185461 - 2⁷ = 28080185333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28080585461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040092730 + 14040092731.

It is an arithmetic number, because the mean of its divisors is an integer number (14040092731).

Almost surely, 2^28080185461 is an apocalyptic number.

It is an amenable number.

28080185461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28080185461 is an equidigital number, since it uses as much as digits as its factorization.

28080185461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 28080185461 in words is "twenty-eight billion, eighty million, one hundred eighty-five thousand, four hundred sixty-one".