55881789 has 16 divisors (see below), whose sum is σ = 77955072. Its totient is φ = 35540208.

The previous prime is 55881767. The next prime is 55881817. The reversal of 55881789 is 98718855.

55881789 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 55881789 - 2¹⁹ = 55357501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55881589) 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 15 ways as a sum of consecutive naturals, for example, 32772 + ... + 34434.

It is an arithmetic number, because the mean of its divisors is an integer number (4872192).

Almost surely, 2^55881789 is an apocalyptic number.

It is an amenable number.

55881789 is a deficient number, since it is larger than the sum of its proper divisors (22073283).

55881789 is a wasteful number, since it uses less digits than its factorization.

55881789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176.

The product of its digits is 806400, while the sum is 51.

The square root of 55881789 is about 7475.4122963219. The cubic root of 55881789 is about 382.3168451164.

The spelling of 55881789 in words is "fifty-five million, eight hundred eighty-one thousand, seven hundred eighty-nine".