28166250732143 has 2 divisors, whose sum is σ = 28166250732144. Its totient is φ = 28166250732142.

The previous prime is 28166250732073. The next prime is 28166250732167. The reversal of 28166250732143 is 34123705266182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28166250732143 - 2²² = 28166246537839 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28166250732091 and 28166250732100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28166250792143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14083125366071 + 14083125366072.

It is an arithmetic number, because the mean of its divisors is an integer number (14083125366072).

Almost surely, 2^{28166250732143} is an apocalyptic number.

28166250732143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28166250732143 is an equidigital number, since it uses as much as digits as its factorization.

28166250732143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 28166250732143 in words is "twenty-eight trillion, one hundred sixty-six billion, two hundred fifty million, seven hundred thirty-two thousand, one hundred forty-three".