56616561097 has 2 divisors, whose sum is σ = 56616561098. Its totient is φ = 56616561096.

The previous prime is 56616561083. The next prime is 56616561109. The reversal of 56616561097 is 79016561665.

It is a happy number.

56616561097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50242774201 + 6373786896 = 224149^2 + 79836^2 .

It is a cyclic number.

It is not a de Polignac number, because 56616561097 - 2¹⁵ = 56616528329 is a prime.

It is not a weakly prime, because it can be changed into another prime (56616561037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28308280548 + 28308280549.

It is an arithmetic number, because the mean of its divisors is an integer number (28308280549).

Almost surely, 2^56616561097 is an apocalyptic number.

It is an amenable number.

56616561097 is a deficient number, since it is larger than the sum of its proper divisors (1).

56616561097 is an equidigital number, since it uses as much as digits as its factorization.

56616561097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 56616561097 in words is "fifty-six billion, six hundred sixteen million, five hundred sixty-one thousand, ninety-seven".