56605660611 has 4 divisors (see below), whose sum is σ = 75474214152. Its totient is φ = 37737107072.

The previous prime is 56605660561. The next prime is 56605660627. The reversal of 56605660611 is 11606650665.

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

It is a cyclic number.

It is not a de Polignac number, because 56605660611 - 2¹⁵ = 56605627843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56605661611) 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, 9434276766 + ... + 9434276771.

It is an arithmetic number, because the mean of its divisors is an integer number (18868553538).

Almost surely, 2^56605660611 is an apocalyptic number.

56605660611 is a deficient number, since it is larger than the sum of its proper divisors (18868553541).

56605660611 is a wasteful number, since it uses less digits than its factorization.

56605660611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18868553540.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 56605660611 in words is "fifty-six billion, six hundred five million, six hundred sixty thousand, six hundred eleven".