55775585 has 8 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 44082544.

The previous prime is 55775581. The next prime is 55775597. The reversal of 55775585 is 58557755.

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

It is a cyclic number.

It is not a de Polignac number, because 55775585 - 2² = 55775581 is a prime.

It is a super-2 number, since 2×55775585² = 6221831764184450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55775581) 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 7 ways as a sum of consecutive naturals, for example, 66785 + ... + 67614.

It is an arithmetic number, because the mean of its divisors is an integer number (8467200).

Almost surely, 2^55775585 is an apocalyptic number.

It is an amenable number.

55775585 is a deficient number, since it is larger than the sum of its proper divisors (11962015).

55775585 is a wasteful number, since it uses less digits than its factorization.

55775585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134487.

The product of its digits is 1225000, while the sum is 47.

The square root of 55775585 is about 7468.3053633338. The cubic root of 55775585 is about 382.0744922935.

The spelling of 55775585 in words is "fifty-five million, seven hundred seventy-five thousand, five hundred eighty-five".