28373506491593 has 2 divisors, whose sum is σ = 28373506491594. Its totient is φ = 28373506491592.

The previous prime is 28373506491571. The next prime is 28373506491623. The reversal of 28373506491593 is 39519460537382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19383661625344 + 8989844866249 = 4402688^2 + 2998307^2 .

It is a cyclic number.

It is not a de Polignac number, because 28373506491593 - 2¹⁰ = 28373506490569 is a prime.

It is a super-2 number, since 2×28373506491593² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28373505491593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14186753245796 + 14186753245797.

It is an arithmetic number, because the mean of its divisors is an integer number (14186753245797).

It is a 2-persistent number, because it is pandigital, and so is 2⋅28373506491593 = 56747012983186, but 3⋅28373506491593 = 85120519474779 is not.

Almost surely, 2^{28373506491593} is an apocalyptic number.

It is an amenable number.

28373506491593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28373506491593 is an equidigital number, since it uses as much as digits as its factorization.

28373506491593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 146966400, while the sum is 65.

The spelling of 28373506491593 in words is "twenty-eight trillion, three hundred seventy-three billion, five hundred six million, four hundred ninety-one thousand, five hundred ninety-three".