28959280226881 has 2 divisors, whose sum is σ = 28959280226882. Its totient is φ = 28959280226880.

The previous prime is 28959280226777. The next prime is 28959280226957. The reversal of 28959280226881 is 18862208295982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28785961215025 + 173319011856 = 5365255^2 + 416316^2 .

It is a cyclic number.

It is not a de Polignac number, because 28959280226881 - 2⁹ = 28959280226369 is a prime.

It is a super-2 number, since 2×28959280226881² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28959280226881.

It is not a weakly prime, because it can be changed into another prime (28959280526881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14479640113440 + 14479640113441.

It is an arithmetic number, because the mean of its divisors is an integer number (14479640113441).

Almost surely, 2^{28959280226881} is an apocalyptic number.

It is an amenable number.

28959280226881 is a deficient number, since it is larger than the sum of its proper divisors (1).

28959280226881 is an equidigital number, since it uses as much as digits as its factorization.

28959280226881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 159252480, while the sum is 70.

The spelling of 28959280226881 in words is "twenty-eight trillion, nine hundred fifty-nine billion, two hundred eighty million, two hundred twenty-six thousand, eight hundred eighty-one".