56520145445 has 4 divisors (see below), whose sum is σ = 67824174540. Its totient is φ = 45216116352.

The previous prime is 56520145433. The next prime is 56520145447. The reversal of 56520145445 is 54454102565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54454102565 = 5 ⋅10890820513.

It can be written as a sum of positive squares in 2 ways, for example, as 25965455044 + 30554690401 = 161138^2 + 174799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56520145445 is a prime.

It is a super-2 number, since 2×56520145445² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56520145447) 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 in 3 ways as a sum of consecutive naturals, for example, 5652014540 + ... + 5652014549.

It is an arithmetic number, because the mean of its divisors is an integer number (16956043635).

Almost surely, 2^56520145445 is an apocalyptic number.

It is an amenable number.

56520145445 is a deficient number, since it is larger than the sum of its proper divisors (11304029095).

56520145445 is a wasteful number, since it uses less digits than its factorization.

56520145445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304029094.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 56520145445 in words is "fifty-six billion, five hundred twenty million, one hundred forty-five thousand, four hundred forty-five".