28565816347 has 2 divisors, whose sum is σ = 28565816348. Its totient is φ = 28565816346.

The previous prime is 28565816339. The next prime is 28565816359. The reversal of 28565816347 is 74361856582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28565816347 - 2³ = 28565816339 is a prime.

It is not a weakly prime, because it can be changed into another prime (28565816327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282908173 + 14282908174.

It is an arithmetic number, because the mean of its divisors is an integer number (14282908174).

Almost surely, 2^28565816347 is an apocalyptic number.

28565816347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28565816347 is an equidigital number, since it uses as much as digits as its factorization.

28565816347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9676800, while the sum is 55.

The spelling of 28565816347 in words is "twenty-eight billion, five hundred sixty-five million, eight hundred sixteen thousand, three hundred forty-seven".