56105611065 has 40 divisors (see below), whose sum is σ = 114942294720. Its totient is φ = 25648278048.

The previous prime is 56105611061. The next prime is 56105611091. The reversal of 56105611065 is 56011650165.

56105611065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56105611065 - 2² = 56105611061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56105611061) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9892335 + ... + 9898004.

It is an arithmetic number, because the mean of its divisors is an integer number (2873557368).

Almost surely, 2^56105611065 is an apocalyptic number.

It is an amenable number.

56105611065 is an abundant number, since it is smaller than the sum of its proper divisors (58836683655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56105611065 is a wasteful number, since it uses less digits than its factorization.

56105611065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19790363 (or 19790354 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 56105611065 in words is "fifty-six billion, one hundred five million, six hundred eleven thousand, sixty-five".