28281516255 has 64 divisors (see below), whose sum is σ = 50533372800. Its totient is φ = 15007196160.

The previous prime is 28281516253. The next prime is 28281516293. The reversal of 28281516255 is 55261518282.

28281516255 is a `hidden beast` number, since 2 + 8 + 2 + 8 + 15 + 1 + 625 + 5 = 666.

It is not a de Polignac number, because 28281516255 - 2¹ = 28281516253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28281516255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281516253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42785625 + ... + 42786285.

It is an arithmetic number, because the mean of its divisors is an integer number (789583950).

Almost surely, 2^28281516255 is an apocalyptic number.

28281516255 is a deficient number, since it is larger than the sum of its proper divisors (22251856545).

28281516255 is a wasteful number, since it uses less digits than its factorization.

28281516255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801 (or 1795 counting only the distinct ones).

The product of its digits is 384000, while the sum is 45.

The spelling of 28281516255 in words is "twenty-eight billion, two hundred eighty-one million, five hundred sixteen thousand, two hundred fifty-five".