5561111728 has 40 divisors (see below), whose sum is σ = 10891226528. Its totient is φ = 2750533632.

The previous prime is 5561111693. The next prime is 5561111737. The reversal of 5561111728 is 8271111655.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2630800 + ... + 2632912.

Almost surely, 2^5561111728 is an apocalyptic number.

It is an amenable number.

5561111728 is a deficient number, since it is larger than the sum of its proper divisors (5330114800).

5561111728 is a wasteful number, since it uses less digits than its factorization.

5561111728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3815 counting only the distinct ones).

The product of its digits is 16800, while the sum is 37.

The square root of 5561111728 is about 74572.8618734724. The cubic root of 5561111728 is about 1771.6878500073.

The spelling of 5561111728 in words is "five billion, five hundred sixty-one million, one hundred eleven thousand, seven hundred twenty-eight".