55011778 has 8 divisors (see below), whose sum is σ = 83648268. Its totient is φ = 27129024.

The previous prime is 55011773. The next prime is 55011793. The reversal of 55011778 is 87711055.

55011778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47651409 + 7360369 = 6903^2 + 2713^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55011773) 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, 188251 + ... + 188542.

Almost surely, 2^55011778 is an apocalyptic number.

55011778 is a deficient number, since it is larger than the sum of its proper divisors (28636490).

55011778 is a wasteful number, since it uses less digits than its factorization.

55011778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376868.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 55011778 is about 7416.9925171865. The cubic root of 55011778 is about 380.3223903047.

The spelling of 55011778 in words is "fifty-five million, eleven thousand, seven hundred seventy-eight".