28774566173 has 2 divisors, whose sum is σ = 28774566174. Its totient is φ = 28774566172.

The previous prime is 28774566137. The next prime is 28774566199. The reversal of 28774566173 is 37166547782.

It is a happy number.

Together with previous prime (28774566137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22950129049 + 5824437124 = 151493^2 + 76318^2 .

It is a cyclic number.

It is not a de Polignac number, because 28774566173 - 2¹⁴ = 28774549789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28774566103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14387283086 + 14387283087.

It is an arithmetic number, because the mean of its divisors is an integer number (14387283087).

Almost surely, 2^28774566173 is an apocalyptic number.

It is an amenable number.

28774566173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28774566173 is an equidigital number, since it uses as much as digits as its factorization.

28774566173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 56.

The spelling of 28774566173 in words is "twenty-eight billion, seven hundred seventy-four million, five hundred sixty-six thousand, one hundred seventy-three".