56556405281 has 8 divisors (see below), whose sum is σ = 56902176000. Its totient is φ = 56211544480.

The previous prime is 56556405211. The next prime is 56556405287. The reversal of 56556405281 is 18250465565.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56556405281 is a prime.

It is a super-2 number, since 2×56556405281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56556405287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102581 + ... + 351618.

It is an arithmetic number, because the mean of its divisors is an integer number (7112772000).

Almost surely, 2^56556405281 is an apocalyptic number.

It is an amenable number.

56556405281 is a deficient number, since it is larger than the sum of its proper divisors (345770719).

56556405281 is a wasteful number, since it uses less digits than its factorization.

56556405281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454959.

The product of its (nonzero) digits is 1440000, while the sum is 47.

The spelling of 56556405281 in words is "fifty-six billion, five hundred fifty-six million, four hundred five thousand, two hundred eighty-one".