55788565 has 16 divisors (see below), whose sum is σ = 76632192. Its totient is φ = 38193984.

The previous prime is 55788553. The next prime is 55788569. The reversal of 55788565 is 56588755.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55788565 - 2¹⁵ = 55755797 is a prime.

It is a super-2 number, since 2×55788565² = 6224727969518450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55788569) 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 15 ways as a sum of consecutive naturals, for example, 38382 + ... + 39808.

It is an arithmetic number, because the mean of its divisors is an integer number (4789512).

Almost surely, 2^55788565 is an apocalyptic number.

It is an amenable number.

55788565 is a deficient number, since it is larger than the sum of its proper divisors (20843627).

55788565 is a wasteful number, since it uses less digits than its factorization.

55788565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556.

The product of its digits is 1680000, while the sum is 49.

The square root of 55788565 is about 7469.1743184906. The cubic root of 55788565 is about 382.1041285717.

The spelling of 55788565 in words is "fifty-five million, seven hundred eighty-eight thousand, five hundred sixty-five".