5561728965 has 48 divisors (see below), whose sum is σ = 10400518128. Its totient is φ = 2733170688.

The previous prime is 5561728951. The next prime is 5561729023. The reversal of 5561728965 is 5698271655.

5561728965 is a `hidden beast` number, since 5 + 561 + 72 + 8 + 9 + 6 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 36 + 5561728929 = 6^2 + 74577^2 .

It is not a de Polignac number, because 5561728965 - 2⁶ = 5561728901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 329307 + ... + 345783.

It is an arithmetic number, because the mean of its divisors is an integer number (216677461).

Almost surely, 2^5561728965 is an apocalyptic number.

It is an amenable number.

5561728965 is a deficient number, since it is larger than the sum of its proper divisors (4838789163).

5561728965 is a wasteful number, since it uses less digits than its factorization.

5561728965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17078 (or 17075 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The square root of 5561728965 is about 74577.0002413613. Note that the first 3 decimals coincide. The cubic root of 5561728965 is about 1771.7533951052.

The spelling of 5561728965 in words is "five billion, five hundred sixty-one million, seven hundred twenty-eight thousand, nine hundred sixty-five".