5561656065 has 36 divisors (see below), whose sum is σ = 11214119124. Its totient is φ = 2542470336.

The previous prime is 5561656057. The next prime is 5561656127. The reversal of 5561656065 is 5606561655.

It can be written as a sum of positive squares in 2 ways, for example, as 2349147024 + 3212509041 = 48468^2 + 56679^2 .

It is not a de Polignac number, because 5561656065 - 2³ = 5561656057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5561656065.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1258942 + ... + 1263351.

It is an arithmetic number, because the mean of its divisors is an integer number (311503309).

Almost surely, 2^5561656065 is an apocalyptic number.

It is an amenable number.

5561656065 is an abundant number, since it is smaller than the sum of its proper divisors (5652463059).

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

5561656065 is a wasteful number, since it uses less digits than its factorization.

5561656065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522318 (or 2522308 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 5561656065 is about 74576.5114831741. The cubic root of 5561656065 is about 1771.7456540240.

The spelling of 5561656065 in words is "five billion, five hundred sixty-one million, six hundred fifty-six thousand, sixty-five".