56716151225621 has 2 divisors, whose sum is σ = 56716151225622. Its totient is φ = 56716151225620.

The previous prime is 56716151225581. The next prime is 56716151225647. The reversal of 56716151225621 is 12652215161765.

56716151225621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54890169264100 + 1825981961521 = 7408790^2 + 1351289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56716151225621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56716151225621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56716151285621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28358075612810 + 28358075612811.

It is an arithmetic number, because the mean of its divisors is an integer number (28358075612811).

Almost surely, 2^{56716151225621} is an apocalyptic number.

It is an amenable number.

56716151225621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56716151225621 is an equidigital number, since it uses as much as digits as its factorization.

56716151225621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 50.

The spelling of 56716151225621 in words is "fifty-six trillion, seven hundred sixteen billion, one hundred fifty-one million, two hundred twenty-five thousand, six hundred twenty-one".