56855860549 has 4 divisors (see below), whose sum is σ = 56858352460. Its totient is φ = 56853368640.

The previous prime is 56855860531. The next prime is 56855860561. The reversal of 56855860549 is 94506855865.

It is a happy number.

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 25959009924 + 30896850625 = 161118^2 + 175775^2 .

It is a cyclic number.

It is not a de Polignac number, because 56855860549 - 2²¹ = 56853763397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56855860519) 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, 1211412 + ... + 1257469.

It is an arithmetic number, because the mean of its divisors is an integer number (14214588115).

Almost surely, 2^56855860549 is an apocalyptic number.

It is an amenable number.

56855860549 is a deficient number, since it is larger than the sum of its proper divisors (2491911).

56855860549 is a wasteful number, since it uses less digits than its factorization.

56855860549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491910.

The product of its (nonzero) digits is 51840000, while the sum is 61.

The spelling of 56855860549 in words is "fifty-six billion, eight hundred fifty-five million, eight hundred sixty thousand, five hundred forty-nine".