28601764822249 has 2 divisors, whose sum is σ = 28601764822250. Its totient is φ = 28601764822248.

The previous prime is 28601764822243. The next prime is 28601764822271. The reversal of 28601764822249 is 94222846710682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26539683182224 + 2062081640025 = 5151668^2 + 1435995^2 .

It is a cyclic number.

It is not a de Polignac number, because 28601764822249 - 2⁴¹ = 26402741566697 is a prime.

It is not a weakly prime, because it can be changed into another prime (28601764822243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14300882411124 + 14300882411125.

It is an arithmetic number, because the mean of its divisors is an integer number (14300882411125).

Almost surely, 2^{28601764822249} is an apocalyptic number.

It is an amenable number.

28601764822249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28601764822249 is an equidigital number, since it uses as much as digits as its factorization.

28601764822249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 28601764822249 in words is "twenty-eight trillion, six hundred one billion, seven hundred sixty-four million, eight hundred twenty-two thousand, two hundred forty-nine".