55558565 has 16 divisors (see below), whose sum is σ = 71176320. Its totient is φ = 41509440.

The previous prime is 55558561. The next prime is 55558579. The reversal of 55558565 is 56585555.

It is not a de Polignac number, because 55558565 - 2² = 55558561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55558561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2627 + ... + 10863.

It is an arithmetic number, because the mean of its divisors is an integer number (4448520).

Almost surely, 2^55558565 is an apocalyptic number.

It is an amenable number.

55558565 is a deficient number, since it is larger than the sum of its proper divisors (15617755).

55558565 is a wasteful number, since it uses less digits than its factorization.

55558565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332.

The product of its digits is 750000, while the sum is 44.

The square root of 55558565 is about 7453.7618019360. The cubic root of 55558565 is about 381.5783039679.

The spelling of 55558565 in words is "fifty-five million, five hundred fifty-eight thousand, five hundred sixty-five".