26654831993 has 2 divisors, whose sum is σ = 26654831994. Its totient is φ = 26654831992.

The previous prime is 26654831989. The next prime is 26654832007. The reversal of 26654831993 is 39913845662.

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., 13710536464 + 12944295529 = 117092^2 + 113773^2 .

It is a cyclic number.

It is not a de Polignac number, because 26654831993 - 2² = 26654831989 is a prime.

It is not a weakly prime, because it can be changed into another prime (26654831933) 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, 13327415996 + 13327415997.

It is an arithmetic number, because the mean of its divisors is an integer number (13327415997).

Almost surely, 2^26654831993 is an apocalyptic number.

It is an amenable number.

26654831993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26654831993 is an equidigital number, since it uses as much as digits as its factorization.

26654831993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 56.

The spelling of 26654831993 in words is "twenty-six billion, six hundred fifty-four million, eight hundred thirty-one thousand, nine hundred ninety-three".