28621155593 has 2 divisors, whose sum is σ = 28621155594. Its totient is φ = 28621155592.

The previous prime is 28621155553. The next prime is 28621155623. The reversal of 28621155593 is 39555112682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21518542864 + 7102612729 = 146692^2 + 84277^2 .

It is a cyclic number.

It is not a de Polignac number, because 28621155593 - 2⁸ = 28621155337 is a prime.

It is not a weakly prime, because it can be changed into another prime (28621155553) 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, 14310577796 + 14310577797.

It is an arithmetic number, because the mean of its divisors is an integer number (14310577797).

Almost surely, 2^28621155593 is an apocalyptic number.

It is an amenable number.

28621155593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28621155593 is an equidigital number, since it uses as much as digits as its factorization.

28621155593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 47.

The spelling of 28621155593 in words is "twenty-eight billion, six hundred twenty-one million, one hundred fifty-five thousand, five hundred ninety-three".