56556551481 has 4 divisors (see below), whose sum is σ = 75408735312. Its totient is φ = 37704367652.

The previous prime is 56556551461. The next prime is 56556551503. The reversal of 56556551481 is 18415565565.

56556551481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56556551481 - 2⁶ = 56556551417 is a prime.

It is a super-2 number, since 2×56556551481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56556551461) 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, 9426091911 + ... + 9426091916.

It is an arithmetic number, because the mean of its divisors is an integer number (18852183828).

Almost surely, 2^56556551481 is an apocalyptic number.

It is an amenable number.

56556551481 is a deficient number, since it is larger than the sum of its proper divisors (18852183831).

56556551481 is a wasteful number, since it uses less digits than its factorization.

56556551481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852183830.

The product of its digits is 3600000, while the sum is 51.

The spelling of 56556551481 in words is "fifty-six billion, five hundred fifty-six million, five hundred fifty-one thousand, four hundred eighty-one".