55917718 has 4 divisors (see below), whose sum is σ = 83876580. Its totient is φ = 27958858.

The previous prime is 55917691. The next prime is 55917737. The reversal of 55917718 is 81771955.

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

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, 13979428 + ... + 13979431.

It is an arithmetic number, because the mean of its divisors is an integer number (20969145).

Almost surely, 2^55917718 is an apocalyptic number.

55917718 is a deficient number, since it is larger than the sum of its proper divisors (27958862).

55917718 is a wasteful number, since it uses less digits than its factorization.

55917718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27958861.

The product of its digits is 88200, while the sum is 43.

The square root of 55917718 is about 7477.8150552150. The cubic root of 55917718 is about 382.3987639868.

The spelling of 55917718 in words is "fifty-five million, nine hundred seventeen thousand, seven hundred eighteen".