28064651566868 has 24 divisors (see below), whose sum is σ = 59083476984000. Its totient is φ = 11394670560768.

The previous prime is 28064651566859. The next prime is 28064651566871. The reversal of 28064651566868 is 86866515646082.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 26376551693 + ... + 26376552756.

It is an arithmetic number, because the mean of its divisors is an integer number (2461811541000).

Almost surely, 2^{28064651566868} is an apocalyptic number.

28064651566868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28064651566868 is an abundant number, since it is smaller than the sum of its proper divisors (31018825417132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28064651566868 is a wasteful number, since it uses less digits than its factorization.

28064651566868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52753104479 (or 52753104477 counting only the distinct ones).

The product of its (nonzero) digits is 796262400, while the sum is 71.

The spelling of 28064651566868 in words is "twenty-eight trillion, sixty-four billion, six hundred fifty-one million, five hundred sixty-six thousand, eight hundred sixty-eight".