5561299728 has 80 divisors (see below), whose sum is σ = 16224755200. Its totient is φ = 1823368320.

The previous prime is 5561299717. The next prime is 5561299729. The reversal of 5561299728 is 8279921655.

5561299728 is a `hidden beast` number, since 5 + 561 + 2 + 9 + 9 + 72 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (5561299729) 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, 79168 + ... + 131871.

It is an arithmetic number, because the mean of its divisors is an integer number (202809440).

Almost surely, 2^5561299728 is an apocalyptic number.

It is an amenable number.

5561299728 is an abundant number, since it is smaller than the sum of its proper divisors (10663455472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5561299728 is a wasteful number, since it uses less digits than its factorization.

5561299728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211117 (or 211105 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 5561299728 is about 74574.1223749901. The cubic root of 5561299728 is about 1771.7078144544.

The spelling of 5561299728 in words is "five billion, five hundred sixty-one million, two hundred ninety-nine thousand, seven hundred twenty-eight".