26699788973593 has 2 divisors, whose sum is σ = 26699788973594. Its totient is φ = 26699788973592.

The previous prime is 26699788973449. The next prime is 26699788973621. The reversal of 26699788973593 is 39537988799662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20488912555024 + 6210876418569 = 4526468^2 + 2492163^2 .

It is a cyclic number.

It is not a de Polignac number, because 26699788973593 - 2¹³ = 26699788965401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26699788973498 and 26699788973507.

It is not a weakly prime, because it can be changed into another prime (26699788973293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13349894486796 + 13349894486797.

It is an arithmetic number, because the mean of its divisors is an integer number (13349894486797).

Almost surely, 2^{26699788973593} is an apocalyptic number.

It is an amenable number.

26699788973593 is a deficient number, since it is larger than the sum of its proper divisors (1).

26699788973593 is an equidigital number, since it uses as much as digits as its factorization.

26699788973593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66663959040, while the sum is 91.

The spelling of 26699788973593 in words is "twenty-six trillion, six hundred ninety-nine billion, seven hundred eighty-eight million, nine hundred seventy-three thousand, five hundred ninety-three".