55585617 has 4 divisors (see below), whose sum is σ = 74114160. Its totient is φ = 37057076.

The previous prime is 55585613. The next prime is 55585637. The reversal of 55585617 is 71658555.

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 55585617 - 2² = 55585613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55585613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9264267 + ... + 9264272.

It is an arithmetic number, because the mean of its divisors is an integer number (18528540).

Almost surely, 2^55585617 is an apocalyptic number.

It is an amenable number.

55585617 is a deficient number, since it is larger than the sum of its proper divisors (18528543).

55585617 is a wasteful number, since it uses less digits than its factorization.

55585617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528542.

The product of its digits is 210000, while the sum is 42.

The square root of 55585617 is about 7455.5762352752. The cubic root of 55585617 is about 381.6402253018.

It can be divided in two parts, 5558 and 5617, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 55585617 in words is "fifty-five million, five hundred eighty-five thousand, six hundred seventeen".