28265609651 has 2 divisors, whose sum is σ = 28265609652. Its totient is φ = 28265609650.

The previous prime is 28265609641. The next prime is 28265609681. The reversal of 28265609651 is 15690656282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28265609651 - 2⁶ = 28265609587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28265609651.

It is not a weakly prime, because it can be changed into another prime (28265609641) 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, 14132804825 + 14132804826.

It is an arithmetic number, because the mean of its divisors is an integer number (14132804826).

Almost surely, 2^28265609651 is an apocalyptic number.

28265609651 is a deficient number, since it is larger than the sum of its proper divisors (1).

28265609651 is an equidigital number, since it uses as much as digits as its factorization.

28265609651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 28265609651 in words is "twenty-eight billion, two hundred sixty-five million, six hundred nine thousand, six hundred fifty-one".