28136643724568 has 16 divisors (see below), whose sum is σ = 53171610190080. Its totient is φ = 13957547673888.

The previous prime is 28136643724529. The next prime is 28136643724571. The reversal of 28136643724568 is 86542734663182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13846772471 + ... + 13846774502.

It is an arithmetic number, because the mean of its divisors is an integer number (3323225636880).

Almost surely, 2^{28136643724568} is an apocalyptic number.

It is an amenable number.

28136643724568 is a deficient number, since it is larger than the sum of its proper divisors (25034966465512).

28136643724568 is a wasteful number, since it uses less digits than its factorization.

28136643724568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27693547106 (or 27693547102 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 65.

The spelling of 28136643724568 in words is "twenty-eight trillion, one hundred thirty-six billion, six hundred forty-three million, seven hundred twenty-four thousand, five hundred sixty-eight".