28433643547 has 2 divisors, whose sum is σ = 28433643548. Its totient is φ = 28433643546.

The previous prime is 28433643529. The next prime is 28433643559. The reversal of 28433643547 is 74534633482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28433643547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28433643547.

It is not a weakly prime, because it can be changed into another prime (28433643587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14216821773 + 14216821774.

It is an arithmetic number, because the mean of its divisors is an integer number (14216821774).

Almost surely, 2^28433643547 is an apocalyptic number.

28433643547 is a deficient number, since it is larger than the sum of its proper divisors (1).

28433643547 is an equidigital number, since it uses as much as digits as its factorization.

28433643547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 49.

The spelling of 28433643547 in words is "twenty-eight billion, four hundred thirty-three million, six hundred forty-three thousand, five hundred forty-seven".