56005561061 has 8 divisors (see below), whose sum is σ = 56164915800. Its totient is φ = 55846361088.

The previous prime is 56005560979. The next prime is 56005561067. The reversal of 56005561061 is 16016550065.

It can be written as a sum of positive squares in 4 ways, for example, as 15320250625 + 40685310436 = 123775^2 + 201706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56005561061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56005561067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706355 + ... + 781631.

It is an arithmetic number, because the mean of its divisors is an integer number (7020614475).

Almost surely, 2^56005561061 is an apocalyptic number.

It is an amenable number.

56005561061 is a deficient number, since it is larger than the sum of its proper divisors (159354739).

56005561061 is a wasteful number, since it uses less digits than its factorization.

56005561061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77383.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 56005561061 in words is "fifty-six billion, five million, five hundred sixty-one thousand, sixty-one".