56181680729 has 2 divisors, whose sum is σ = 56181680730. Its totient is φ = 56181680728.

The previous prime is 56181680717. The next prime is 56181680741. The reversal of 56181680729 is 92708618165.

It is a balanced prime because it is at equal distance from previous prime (56181680717) and next prime (56181680741).

It can be written as a sum of positive squares in only one way, i.e., 52041015625 + 4140665104 = 228125^2 + 64348^2 .

It is a cyclic number.

It is not a de Polignac number, because 56181680729 - 2⁴ = 56181680713 is a prime.

It is not a weakly prime, because it can be changed into another prime (56181610729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28090840364 + 28090840365.

It is an arithmetic number, because the mean of its divisors is an integer number (28090840365).

Almost surely, 2^56181680729 is an apocalyptic number.

It is an amenable number.

56181680729 is a deficient number, since it is larger than the sum of its proper divisors (1).

56181680729 is an equidigital number, since it uses as much as digits as its factorization.

56181680729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 56181680729 in words is "fifty-six billion, one hundred eighty-one million, six hundred eighty thousand, seven hundred twenty-nine".