56451242743521 has 16 divisors (see below), whose sum is σ = 75656325463488. Its totient is φ = 37440190872000.

The previous prime is 56451242743513. The next prime is 56451242743529. The reversal of 56451242743521 is 12534724215465.

56451242743521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56451242743513) and next prime (56451242743529).

It is not a de Polignac number, because 56451242743521 - 2³ = 56451242743513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56451242743529) 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 in 15 ways as a sum of consecutive naturals, for example, 3816846 + ... + 11290296.

It is an arithmetic number, because the mean of its divisors is an integer number (4728520341468).

Almost surely, 2^{56451242743521} is an apocalyptic number.

It is an amenable number.

56451242743521 is a deficient number, since it is larger than the sum of its proper divisors (19205082719967).

56451242743521 is a wasteful number, since it uses less digits than its factorization.

56451242743521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486432.

The product of its digits is 8064000, while the sum is 51.

Adding to 56451242743521 its reverse (12534724215465), we get a palindrome (68985966958986).

The spelling of 56451242743521 in words is "fifty-six trillion, four hundred fifty-one billion, two hundred forty-two million, seven hundred forty-three thousand, five hundred twenty-one".