28637773543 has 2 divisors, whose sum is σ = 28637773544. Its totient is φ = 28637773542.

The previous prime is 28637773537. The next prime is 28637773553. The reversal of 28637773543 is 34537773682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28637773543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28637773513) 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, 14318886771 + 14318886772.

It is an arithmetic number, because the mean of its divisors is an integer number (14318886772).

Almost surely, 2^28637773543 is an apocalyptic number.

28637773543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28637773543 is an equidigital number, since it uses as much as digits as its factorization.

28637773543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 55.

The spelling of 28637773543 in words is "twenty-eight billion, six hundred thirty-seven million, seven hundred seventy-three thousand, five hundred forty-three".