28126558673 has 2 divisors, whose sum is σ = 28126558674. Its totient is φ = 28126558672.

The previous prime is 28126558637. The next prime is 28126558699. The reversal of 28126558673 is 37685562182.

Together with previous prime (28126558637) 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., 15359140624 + 12767418049 = 123932^2 + 112993^2 .

It is a cyclic number.

It is not a de Polignac number, because 28126558673 - 2¹⁸ = 28126296529 is a prime.

It is a super-2 number, since 2×28126558673² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28126558613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063279336 + 14063279337.

It is an arithmetic number, because the mean of its divisors is an integer number (14063279337).

Almost surely, 2^28126558673 is an apocalyptic number.

It is an amenable number.

28126558673 is a deficient number, since it is larger than the sum of its proper divisors (1).

28126558673 is an equidigital number, since it uses as much as digits as its factorization.

28126558673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 53.

The spelling of 28126558673 in words is "twenty-eight billion, one hundred twenty-six million, five hundred fifty-eight thousand, six hundred seventy-three".