55678817 has 4 divisors (see below), whose sum is σ = 55695360. Its totient is φ = 55662276.

The previous prime is 55678789. The next prime is 55678823. The reversal of 55678817 is 71887655.

It is a happy number.

55678817 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 55678817 - 2¹⁶ = 55613281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55678517) 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, 1217 + ... + 10622.

It is an arithmetic number, because the mean of its divisors is an integer number (13923840).

Almost surely, 2^55678817 is an apocalyptic number.

It is an amenable number.

55678817 is a deficient number, since it is larger than the sum of its proper divisors (16543).

55678817 is a wasteful number, since it uses less digits than its factorization.

55678817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16542.

The product of its digits is 470400, while the sum is 47.

The square root of 55678817 is about 7461.8239727295. The cubic root of 55678817 is about 381.8534039984.

The spelling of 55678817 in words is "fifty-five million, six hundred seventy-eight thousand, eight hundred seventeen".