56628943361 has 4 divisors (see below), whose sum is σ = 56633073492. Its totient is φ = 56624813232.

The previous prime is 56628943339. The next prime is 56628943363. The reversal of 56628943361 is 16334982665.

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 29461662736 + 27167280625 = 171644^2 + 164825^2 .

It is a cyclic number.

It is not a de Polignac number, because 56628943361 - 2¹⁸ = 56628681217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56628943363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044430 + ... + 2071943.

It is an arithmetic number, because the mean of its divisors is an integer number (14158268373).

Almost surely, 2^56628943361 is an apocalyptic number.

It is an amenable number.

56628943361 is a deficient number, since it is larger than the sum of its proper divisors (4130131).

56628943361 is a wasteful number, since it uses less digits than its factorization.

56628943361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130130.

The product of its digits is 5598720, while the sum is 53.

The spelling of 56628943361 in words is "fifty-six billion, six hundred twenty-eight million, nine hundred forty-three thousand, three hundred sixty-one".