28723348981871 has 2 divisors, whose sum is σ = 28723348981872. Its totient is φ = 28723348981870.

The previous prime is 28723348981823. The next prime is 28723348981907. The reversal of 28723348981871 is 17818984332782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28723348981871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28723348981795 and 28723348981804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28723348981571) 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, 14361674490935 + 14361674490936.

It is an arithmetic number, because the mean of its divisors is an integer number (14361674490936).

Almost surely, 2^{28723348981871} is an apocalyptic number.

28723348981871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28723348981871 is an equidigital number, since it uses as much as digits as its factorization.

28723348981871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 260112384, while the sum is 71.

The spelling of 28723348981871 in words is "twenty-eight trillion, seven hundred twenty-three billion, three hundred forty-eight million, nine hundred eighty-one thousand, eight hundred seventy-one".