28618111645 has 16 divisors (see below), whose sum is σ = 34834174848. Its totient is φ = 22566358080.

The previous prime is 28618111633. The next prime is 28618111693. The reversal of 28618111645 is 54611181682.

It is not a de Polignac number, because 28618111645 - 2⁷ = 28618111517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1922722 + ... + 1937548.

It is an arithmetic number, because the mean of its divisors is an integer number (2177135928).

Almost surely, 2^28618111645 is an apocalyptic number.

It is an amenable number.

28618111645 is a deficient number, since it is larger than the sum of its proper divisors (6216063203).

28618111645 is a wasteful number, since it uses less digits than its factorization.

28618111645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340.

The product of its digits is 92160, while the sum is 43.

The spelling of 28618111645 in words is "twenty-eight billion, six hundred eighteen million, one hundred eleven thousand, six hundred forty-five".