56171853605 has 8 divisors (see below), whose sum is σ = 77035684992. Its totient is φ = 38517842448.

The previous prime is 56171853581. The next prime is 56171853607. The reversal of 56171853605 is 50635817165.

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

It is a cyclic number.

It is not a de Polignac number, because 56171853605 - 2⁶ = 56171853541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56171853605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56171853607) 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 7 ways as a sum of consecutive naturals, for example, 802455017 + ... + 802455086.

It is an arithmetic number, because the mean of its divisors is an integer number (9629460624).

Almost surely, 2^56171853605 is an apocalyptic number.

It is an amenable number.

56171853605 is a deficient number, since it is larger than the sum of its proper divisors (20863831387).

56171853605 is a wasteful number, since it uses less digits than its factorization.

56171853605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604910115.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 56171853605 in words is "fifty-six billion, one hundred seventy-one million, eight hundred fifty-three thousand, six hundred five".