55078789 has 4 divisors (see below), whose sum is σ = 55135360. Its totient is φ = 55022220.

The previous prime is 55078781. The next prime is 55078811. The reversal of 55078789 is 98787055.

55078789 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, and also an emirpimes, since its reverse is a distinct semiprime: 98787055 = 5 ⋅19757411.

It is a cyclic number.

It is not a de Polignac number, because 55078789 - 2³ = 55078781 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 (55078781) 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 3 ways as a sum of consecutive naturals, for example, 26799 + ... + 28780.

It is an arithmetic number, because the mean of its divisors is an integer number (13783840).

Almost surely, 2^55078789 is an apocalyptic number.

It is an amenable number.

55078789 is a deficient number, since it is larger than the sum of its proper divisors (56571).

55078789 is an equidigital number, since it uses as much as digits as its factorization.

55078789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56570.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 55078789 is about 7421.5085393739. The cubic root of 55078789 is about 380.4767538693.

The spelling of 55078789 in words is "fifty-five million, seventy-eight thousand, seven hundred eighty-nine".