28646266417 has 2 divisors, whose sum is σ = 28646266418. Its totient is φ = 28646266416.

The previous prime is 28646266409. The next prime is 28646266447. The reversal of 28646266417 is 71466264682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27619448481 + 1026817936 = 166191^2 + 32044^2 .

It is a cyclic number.

It is not a de Polignac number, because 28646266417 - 2³ = 28646266409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28646266447) 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, 14323133208 + 14323133209.

It is an arithmetic number, because the mean of its divisors is an integer number (14323133209).

Almost surely, 2^28646266417 is an apocalyptic number.

It is an amenable number.

28646266417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28646266417 is an equidigital number, since it uses as much as digits as its factorization.

28646266417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 52.

The spelling of 28646266417 in words is "twenty-eight billion, six hundred forty-six million, two hundred sixty-six thousand, four hundred seventeen".