28971726555523 has 2 divisors, whose sum is σ = 28971726555524. Its totient is φ = 28971726555522.

The previous prime is 28971726555427. The next prime is 28971726555661. The reversal of 28971726555523 is 32555562717982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28971726555523 - 2²¹ = 28971724458371 is a prime.

It is not a weakly prime, because it can be changed into another prime (28971726555223) 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, 14485863277761 + 14485863277762.

It is an arithmetic number, because the mean of its divisors is an integer number (14485863277762).

Almost surely, 2^{28971726555523} is an apocalyptic number.

28971726555523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28971726555523 is an equidigital number, since it uses as much as digits as its factorization.

28971726555523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520000, while the sum is 67.

The spelling of 28971726555523 in words is "twenty-eight trillion, nine hundred seventy-one billion, seven hundred twenty-six million, five hundred fifty-five thousand, five hundred twenty-three".