28387594655999 has 16 divisors (see below), whose sum is σ = 29948523558912. Its totient is φ = 26854927575168.

The previous prime is 28387594655929. The next prime is 28387594656007. The reversal of 28387594655999 is 99955649578382.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28387594655999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28387594655929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10592027 + ... + 12998700.

It is an arithmetic number, because the mean of its divisors is an integer number (1871782722432).

Almost surely, 2^{28387594655999} is an apocalyptic number.

28387594655999 is a deficient number, since it is larger than the sum of its proper divisors (1560928902913).

28387594655999 is a wasteful number, since it uses less digits than its factorization.

28387594655999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23591326.

The product of its digits is 52907904000, while the sum is 89.

The spelling of 28387594655999 in words is "twenty-eight trillion, three hundred eighty-seven billion, five hundred ninety-four million, six hundred fifty-five thousand, nine hundred ninety-nine".