28246456649 has 2 divisors, whose sum is σ = 28246456650. Its totient is φ = 28246456648.

The previous prime is 28246456643. The next prime is 28246456657. The reversal of 28246456649 is 94665464282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27214441024 + 1032015625 = 164968^2 + 32125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28246456649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28246456594 and 28246456603.

It is not a weakly prime, because it can be changed into another prime (28246456643) 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, 14123228324 + 14123228325.

It is an arithmetic number, because the mean of its divisors is an integer number (14123228325).

Almost surely, 2^28246456649 is an apocalyptic number.

It is an amenable number.

28246456649 is a deficient number, since it is larger than the sum of its proper divisors (1).

28246456649 is an equidigital number, since it uses as much as digits as its factorization.

28246456649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 56.

The spelling of 28246456649 in words is "twenty-eight billion, two hundred forty-six million, four hundred fifty-six thousand, six hundred forty-nine".