55117685 has 8 divisors (see below), whose sum is σ = 75590016. Its totient is φ = 37794960.

The previous prime is 55117649. The next prime is 55117687. The reversal of 55117685 is 58671155.

It is a happy number.

55117685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55117685 - 2¹⁶ = 55052149 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 (55117687) 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 7 ways as a sum of consecutive naturals, for example, 787361 + ... + 787430.

It is an arithmetic number, because the mean of its divisors is an integer number (9448752).

Almost surely, 2^55117685 is an apocalyptic number.

It is an amenable number.

55117685 is a deficient number, since it is larger than the sum of its proper divisors (20472331).

55117685 is a wasteful number, since it uses less digits than its factorization.

55117685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574803.

The product of its digits is 42000, while the sum is 38.

The square root of 55117685 is about 7424.1285683910. The cubic root of 55117685 is about 380.5662955472.

The spelling of 55117685 in words is "fifty-five million, one hundred seventeen thousand, six hundred eighty-five".