5561947907 has 2 divisors, whose sum is σ = 5561947908. Its totient is φ = 5561947906.

The previous prime is 5561947901. The next prime is 5561947921. The reversal of 5561947907 is 7097491655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5561947907 - 2¹⁴ = 5561931523 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561947901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780973953 + 2780973954.

It is an arithmetic number, because the mean of its divisors is an integer number (2780973954).

Almost surely, 2^5561947907 is an apocalyptic number.

5561947907 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561947907 is an equidigital number, since it uses as much as digits as its factorization.

5561947907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The square root of 5561947907 is about 74578.4681191562. The cubic root of 5561947907 is about 1771.7766436396.

The spelling of 5561947907 in words is "five billion, five hundred sixty-one million, nine hundred forty-seven thousand, nine hundred seven".