56651661601 has 2 divisors, whose sum is σ = 56651661602. Its totient is φ = 56651661600.

The previous prime is 56651661571. The next prime is 56651661631. The reversal of 56651661601 is 10616615665.

It is a balanced prime because it is at equal distance from previous prime (56651661571) and next prime (56651661631).

It can be written as a sum of positive squares in only one way, i.e., 49824936225 + 6826725376 = 223215^2 + 82624^2 .

It is a cyclic number.

It is not a de Polignac number, because 56651661601 - 2⁵ = 56651661569 is a prime.

It is not a weakly prime, because it can be changed into another prime (56651661631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28325830800 + 28325830801.

It is an arithmetic number, because the mean of its divisors is an integer number (28325830801).

Almost surely, 2^56651661601 is an apocalyptic number.

It is an amenable number.

56651661601 is a deficient number, since it is larger than the sum of its proper divisors (1).

56651661601 is an equidigital number, since it uses as much as digits as its factorization.

56651661601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 56651661601 in words is "fifty-six billion, six hundred fifty-one million, six hundred sixty-one thousand, six hundred one".