56181018165 has 16 divisors (see below), whose sum is σ = 90714307200. Its totient is φ = 29688316992.

The previous prime is 56181018161. The next prime is 56181018199.

56181018165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56181018165 - 2² = 56181018161 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56181018161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17179105 + ... + 17182374.

It is an arithmetic number, because the mean of its divisors is an integer number (5669644200).

Almost surely, 2^56181018165 is an apocalyptic number.

It is an amenable number.

56181018165 is a deficient number, since it is larger than the sum of its proper divisors (34533289035).

56181018165 is a wasteful number, since it uses less digits than its factorization.

56181018165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34361596.

The product of its (nonzero) digits is 57600, while the sum is 42.

It can be divided in two parts, 561810 and 18165, that added together give a palindrome (579975).

The spelling of 56181018165 in words is "fifty-six billion, one hundred eighty-one million, eighteen thousand, one hundred sixty-five".