5649166728 has 48 divisors (see below), whose sum is σ = 15348769020. Its totient is φ = 1877031936.

The previous prime is 5649166723. The next prime is 5649166741. The reversal of 5649166728 is 8276619465.

5649166728 is a `hidden beast` number, since 564 + 9 + 1 + 6 + 6 + 72 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5155527204 + 493639524 = 71802^2 + 22218^2 .

It is not an unprimeable number, because it can be changed into a prime (5649166723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102801 + ... + 147872.

Almost surely, 2^5649166728 is an apocalyptic number.

It is an amenable number.

5649166728 is an abundant number, since it is smaller than the sum of its proper divisors (9699602292).

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

5649166728 is a wasteful number, since it uses less digits than its factorization.

5649166728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250998 (or 250991 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 5649166728 is about 75160.9388445887. The cubic root of 5649166728 is about 1780.9899311980.

The spelling of 5649166728 in words is "five billion, six hundred forty-nine million, one hundred sixty-six thousand, seven hundred twenty-eight".