56846216561 has 2 divisors, whose sum is σ = 56846216562. Its totient is φ = 56846216560.

The previous prime is 56846216549. The next prime is 56846216573. The reversal of 56846216561 is 16561264865.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (56846216549) and next prime (56846216573).

It can be written as a sum of positive squares in only one way, i.e., 51033069025 + 5813147536 = 225905^2 + 76244^2 .

It is a cyclic number.

It is not a de Polignac number, because 56846216561 - 2¹⁰ = 56846215537 is a prime.

It is a super-2 number, since 2×56846216561² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56846216521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28423108280 + 28423108281.

It is an arithmetic number, because the mean of its divisors is an integer number (28423108281).

Almost surely, 2^56846216561 is an apocalyptic number.

It is an amenable number.

56846216561 is a deficient number, since it is larger than the sum of its proper divisors (1).

56846216561 is an equidigital number, since it uses as much as digits as its factorization.

56846216561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 50.

The spelling of 56846216561 in words is "fifty-six billion, eight hundred forty-six million, two hundred sixteen thousand, five hundred sixty-one".