56461716121 has 2 divisors, whose sum is σ = 56461716122. Its totient is φ = 56461716120.

The previous prime is 56461716097. The next prime is 56461716161. The reversal of 56461716121 is 12161716465.

It is an a-pointer prime, because the next prime (56461716161) can be obtained adding 56461716121 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54945704025 + 1516012096 = 234405^2 + 38936^2 .

It is a cyclic number.

It is not a de Polignac number, because 56461716121 - 2¹¹ = 56461714073 is a prime.

It is not a weakly prime, because it can be changed into another prime (56461716161) 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, 28230858060 + 28230858061.

It is an arithmetic number, because the mean of its divisors is an integer number (28230858061).

Almost surely, 2^56461716121 is an apocalyptic number.

It is an amenable number.

56461716121 is a deficient number, since it is larger than the sum of its proper divisors (1).

56461716121 is an equidigital number, since it uses as much as digits as its factorization.

56461716121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The spelling of 56461716121 in words is "fifty-six billion, four hundred sixty-one million, seven hundred sixteen thousand, one hundred twenty-one".