56420045243545 has 4 divisors (see below), whose sum is σ = 67704054292260. Its totient is φ = 45136036194832.

The previous prime is 56420045243509. The next prime is 56420045243563. The reversal of 56420045243545 is 54534254002465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11112782285056 + 45307262958489 = 3333584^2 + 6731067^2 .

It is a cyclic number.

It is not a de Polignac number, because 56420045243545 - 2¹⁹ = 56420044719257 is a prime.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5642004524350 + ... + 5642004524359.

It is an arithmetic number, because the mean of its divisors is an integer number (16926013573065).

Almost surely, 2^{56420045243545} is an apocalyptic number.

It is an amenable number.

56420045243545 is a deficient number, since it is larger than the sum of its proper divisors (11284009048715).

56420045243545 is a wasteful number, since it uses less digits than its factorization.

56420045243545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11284009048714.

The product of its (nonzero) digits is 11520000, while the sum is 49.

The spelling of 56420045243545 in words is "fifty-six trillion, four hundred twenty billion, forty-five million, two hundred forty-three thousand, five hundred forty-five".