26989328893 has 2 divisors, whose sum is σ = 26989328894. Its totient is φ = 26989328892.

The previous prime is 26989328869. The next prime is 26989328921. The reversal of 26989328893 is 39882398962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26797035204 + 192293689 = 163698^2 + 13867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26989328893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26989328393) 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, 13494664446 + 13494664447.

It is an arithmetic number, because the mean of its divisors is an integer number (13494664447).

Almost surely, 2^26989328893 is an apocalyptic number.

It is an amenable number.

26989328893 is a deficient number, since it is larger than the sum of its proper divisors (1).

26989328893 is an equidigital number, since it uses as much as digits as its factorization.

26989328893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80621568, while the sum is 67.

The spelling of 26989328893 in words is "twenty-six billion, nine hundred eighty-nine million, three hundred twenty-eight thousand, eight hundred ninety-three".