28112681618 has 64 divisors (see below), whose sum is σ = 53775187200. Its totient is φ = 10730465280.

The previous prime is 28112681617. The next prime is 28112681687. The reversal of 28112681618 is 81618621182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28112681617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4613918 + ... + 4620006.

It is an arithmetic number, because the mean of its divisors is an integer number (840237300).

Almost surely, 2^28112681618 is an apocalyptic number.

28112681618 is a deficient number, since it is larger than the sum of its proper divisors (25662505582).

28112681618 is a wasteful number, since it uses less digits than its factorization.

28112681618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7155.

The product of its digits is 73728, while the sum is 44.

The spelling of 28112681618 in words is "twenty-eight billion, one hundred twelve million, six hundred eighty-one thousand, six hundred eighteen".