28510989235213 has 2 divisors, whose sum is σ = 28510989235214. Its totient is φ = 28510989235212.

The previous prime is 28510989235187. The next prime is 28510989235243. The reversal of 28510989235213 is 31253298901582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27174149171689 + 1336840063524 = 5212883^2 + 1156218^2 .

It is a cyclic number.

It is not a de Polignac number, because 28510989235213 - 2⁹ = 28510989234701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28510989235243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14255494617606 + 14255494617607.

It is an arithmetic number, because the mean of its divisors is an integer number (14255494617607).

Almost surely, 2^{28510989235213} is an apocalyptic number.

It is an amenable number.

28510989235213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28510989235213 is an equidigital number, since it uses as much as digits as its factorization.

28510989235213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 28510989235213 in words is "twenty-eight trillion, five hundred ten billion, nine hundred eighty-nine million, two hundred thirty-five thousand, two hundred thirteen".