28081207850173 has 2 divisors, whose sum is σ = 28081207850174. Its totient is φ = 28081207850172.

The previous prime is 28081207850153. The next prime is 28081207850207. The reversal of 28081207850173 is 37105870218082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24758764769124 + 3322443081049 = 4975818^2 + 1822757^2 .

It is a cyclic number.

It is not a de Polignac number, because 28081207850173 - 2⁵ = 28081207850141 is a prime.

It is a super-2 number, since 2×28081207850173² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28081207850173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28081207850123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040603925086 + 14040603925087.

It is an arithmetic number, because the mean of its divisors is an integer number (14040603925087).

Almost surely, 2^{28081207850173} is an apocalyptic number.

It is an amenable number.

28081207850173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081207850173 is an equidigital number, since it uses as much as digits as its factorization.

28081207850173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 28081207850173 in words is "twenty-eight trillion, eighty-one billion, two hundred seven million, eight hundred fifty thousand, one hundred seventy-three".