28156029593 has 2 divisors, whose sum is σ = 28156029594. Its totient is φ = 28156029592.

The previous prime is 28156029521. The next prime is 28156029607. The reversal of 28156029593 is 39592065182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27031634569 + 1124395024 = 164413^2 + 33532^2 .

It is a cyclic number.

It is not a de Polignac number, because 28156029593 - 2²⁰ = 28154981017 is a prime.

It is not a weakly prime, because it can be changed into another prime (28156029193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14078014796 + 14078014797.

It is an arithmetic number, because the mean of its divisors is an integer number (14078014797).

Almost surely, 2^28156029593 is an apocalyptic number.

It is an amenable number.

28156029593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28156029593 is an equidigital number, since it uses as much as digits as its factorization.

28156029593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 28156029593 in words is "twenty-eight billion, one hundred fifty-six million, twenty-nine thousand, five hundred ninety-three".