5561947917 has 8 divisors (see below), whose sum is σ = 8239922880. Its totient is φ = 3707965260.

The previous prime is 5561947907. The next prime is 5561947921. The reversal of 5561947917 is 7197491655.

5561947917 is a `hidden beast` number, since 5 + 5 + 619 + 4 + 7 + 9 + 17 = 666.

It is not a de Polignac number, because 5561947917 - 2⁴ = 5561947901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561947907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102999009 + ... + 102999062.

It is an arithmetic number, because the mean of its divisors is an integer number (1029990360).

Almost surely, 2^5561947917 is an apocalyptic number.

It is an amenable number.

5561947917 is a deficient number, since it is larger than the sum of its proper divisors (2677974963).

5561947917 is a wasteful number, since it uses less digits than its factorization.

5561947917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205998080 (or 205998074 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 54.

The square root of 5561947917 is about 74578.4681861997. The cubic root of 5561947917 is about 1771.7766447015.

The spelling of 5561947917 in words is "five billion, five hundred sixty-one million, nine hundred forty-seven thousand, nine hundred seventeen".