55619585 has 16 divisors (see below), whose sum is σ = 76524672. Its totient is φ = 38016000.

The previous prime is 55619561. The next prime is 55619591. The reversal of 55619585 is 58591655.

It is not a de Polignac number, because 55619585 - 2¹⁰ = 55618561 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9185 + ... + 13985.

It is an arithmetic number, because the mean of its divisors is an integer number (4782792).

Almost surely, 2^55619585 is an apocalyptic number.

It is an amenable number.

55619585 is a deficient number, since it is larger than the sum of its proper divisors (20905087).

55619585 is a wasteful number, since it uses less digits than its factorization.

55619585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144.

The product of its digits is 270000, while the sum is 44.

The square root of 55619585 is about 7457.8539138280. The cubic root of 55619585 is about 381.7179487377.

The spelling of 55619585 in words is "fifty-five million, six hundred nineteen thousand, five hundred eighty-five".