56133579661 has 4 divisors (see below), whose sum is σ = 56162621212. Its totient is φ = 56104538112.

The previous prime is 56133579653. The next prime is 56133579703. The reversal of 56133579661 is 16697533165.

56133579661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 41662933225 + 14470646436 = 204115^2 + 120294^2 .

It is a cyclic number.

It is not a de Polignac number, because 56133579661 - 2³ = 56133579653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56133579599 and 56133579608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56133579631) 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, 14517876 + ... + 14521741.

It is an arithmetic number, because the mean of its divisors is an integer number (14040655303).

Almost surely, 2^56133579661 is an apocalyptic number.

It is an amenable number.

56133579661 is a deficient number, since it is larger than the sum of its proper divisors (29041551).

56133579661 is a wasteful number, since it uses less digits than its factorization.

56133579661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29041550.

The product of its digits is 3061800, while the sum is 52.

The spelling of 56133579661 in words is "fifty-six billion, one hundred thirty-three million, five hundred seventy-nine thousand, six hundred sixty-one".