55678918 has 4 divisors (see below), whose sum is σ = 83518380. Its totient is φ = 27839458.

The previous prime is 55678907. The next prime is 55678933. The reversal of 55678918 is 81987655.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13919728 + ... + 13919731.

It is an arithmetic number, because the mean of its divisors is an integer number (20879595).

Almost surely, 2^55678918 is an apocalyptic number.

55678918 is a deficient number, since it is larger than the sum of its proper divisors (27839462).

55678918 is a wasteful number, since it uses less digits than its factorization.

55678918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27839461.

The product of its digits is 604800, while the sum is 49.

The square root of 55678918 is about 7461.8307405087. The cubic root of 55678918 is about 381.8536348891.

The spelling of 55678918 in words is "fifty-five million, six hundred seventy-eight thousand, nine hundred eighteen".