28415286643 has 2 divisors, whose sum is σ = 28415286644. Its totient is φ = 28415286642.

The previous prime is 28415286637. The next prime is 28415286671. The reversal of 28415286643 is 34668251482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28415286643 - 2²¹ = 28413189491 is a prime.

It is not a weakly prime, because it can be changed into another prime (28415286673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14207643321 + 14207643322.

It is an arithmetic number, because the mean of its divisors is an integer number (14207643322).

Almost surely, 2^28415286643 is an apocalyptic number.

28415286643 is a deficient number, since it is larger than the sum of its proper divisors (1).

28415286643 is an equidigital number, since it uses as much as digits as its factorization.

28415286643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 49.

The spelling of 28415286643 in words is "twenty-eight billion, four hundred fifteen million, two hundred eighty-six thousand, six hundred forty-three".