5561656057 has 2 divisors, whose sum is σ = 5561656058. Its totient is φ = 5561656056.

The previous prime is 5561656049. The next prime is 5561656127. The reversal of 5561656057 is 7506561655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2789001721 + 2772654336 = 52811^2 + 52656^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561656057 - 2³ = 5561656049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5561655998 and 5561656016.

It is not a weakly prime, because it can be changed into another prime (5561656157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780828028 + 2780828029.

It is an arithmetic number, because the mean of its divisors is an integer number (2780828029).

Almost surely, 2^5561656057 is an apocalyptic number.

It is an amenable number.

5561656057 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561656057 is an equidigital number, since it uses as much as digits as its factorization.

5561656057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945000, while the sum is 46.

The square root of 5561656057 is about 74576.5114295379. The cubic root of 5561656057 is about 1771.7456531745.

The spelling of 5561656057 in words is "five billion, five hundred sixty-one million, six hundred fifty-six thousand, fifty-seven".