56554989909 has 64 divisors (see below), whose sum is σ = 85542912000. Its totient is φ = 32942543040.

The previous prime is 56554989833. The next prime is 56554989919. The reversal of 56554989909 is 90998945565.

56554989909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56554989909 - 2⁹ = 56554989397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56554989919) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18130852 + ... + 18133970.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608000).

Almost surely, 2^56554989909 is an apocalyptic number.

56554989909 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

56554989909 is a deficient number, since it is larger than the sum of its proper divisors (28987922091).

56554989909 is a wasteful number, since it uses less digits than its factorization.

56554989909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 157464000, while the sum is 69.

The spelling of 56554989909 in words is "fifty-six billion, five hundred fifty-four million, nine hundred eighty-nine thousand, nine hundred nine".