5561782281 has 12 divisors (see below), whose sum is σ = 8764020720. Its totient is φ = 3370777080.

The previous prime is 5561782267. The next prime is 5561782333. The reversal of 5561782281 is 1822871655.

5561782281 is a `hidden beast` number, since 5 + 5 + 617 + 8 + 2 + 28 + 1 = 666.

It is not a de Polignac number, because 5561782281 - 2⁵ = 5561782249 is a prime.

It is a super-2 number, since 2×5561782281² = 61866844282491125922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5561782241) 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, 28089711 + ... + 28089908.

It is an arithmetic number, because the mean of its divisors is an integer number (730335060).

Almost surely, 2^5561782281 is an apocalyptic number.

It is an amenable number.

5561782281 is a deficient number, since it is larger than the sum of its proper divisors (3202238439).

5561782281 is a wasteful number, since it uses less digits than its factorization.

5561782281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56179636 (or 56179633 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 5561782281 is about 74577.3576965556. The cubic root of 5561782281 is about 1771.7590565642.

The spelling of 5561782281 in words is "five billion, five hundred sixty-one million, seven hundred eighty-two thousand, two hundred eighty-one".