5561728956171 has 12 divisors (see below), whose sum is σ = 8034031538520. Its totient is φ = 3707624052000.

The previous prime is 5561728956169. The next prime is 5561728956187. The reversal of 5561728956171 is 1716598271655.

It is a happy number.

5561728956171 is a `hidden beast` number, since 5 + 5 + 6 + 1 + 7 + 2 + 8 + 9 + 5 + 617 + 1 = 666.

It is not a de Polignac number, because 5561728956171 - 2¹ = 5561728956169 is a prime.

It is a super-2 number, since 2×5561728956171² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5561728956099 and 5561728956108.

It is not an unprimeable number, because it can be changed into a prime (5561728956191) 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, 16090501 + ... + 16432518.

It is an arithmetic number, because the mean of its divisors is an integer number (669502628210).

Almost surely, 2^{5561728956171} is an apocalyptic number.

5561728956171 is a deficient number, since it is larger than the sum of its proper divisors (2472302582349).

5561728956171 is a wasteful number, since it uses less digits than its factorization.

5561728956171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32542026 (or 32542023 counting only the distinct ones).

The product of its digits is 31752000, while the sum is 63.

The spelling of 5561728956171 in words is "five trillion, five hundred sixty-one billion, seven hundred twenty-eight million, nine hundred fifty-six thousand, one hundred seventy-one".