51656060017 has 2 divisors, whose sum is σ = 51656060018. Its totient is φ = 51656060016.

The previous prime is 51656059991. The next prime is 51656060059. The reversal of 51656060017 is 71006065615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42814231056 + 8841828961 = 206916^2 + 94031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51656060017 is a prime.

It is not a weakly prime, because it can be changed into another prime (51656066017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25828030008 + 25828030009.

It is an arithmetic number, because the mean of its divisors is an integer number (25828030009).

Almost surely, 2^51656060017 is an apocalyptic number.

It is an amenable number.

51656060017 is a deficient number, since it is larger than the sum of its proper divisors (1).

51656060017 is an equidigital number, since it uses as much as digits as its factorization.

51656060017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 51656060017 in words is "fifty-one billion, six hundred fifty-six million, sixty thousand, seventeen".