55663565 has 16 divisors (see below), whose sum is σ = 70167168. Its totient is φ = 42309696.

The previous prime is 55663561. The next prime is 55663567. The reversal of 55663565 is 56536655.

It is not a de Polignac number, because 55663565 - 2² = 55663561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663561) 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, 16514 + ... + 19596.

It is an arithmetic number, because the mean of its divisors is an integer number (4385448).

Almost surely, 2^55663565 is an apocalyptic number.

It is an amenable number.

55663565 is a deficient number, since it is larger than the sum of its proper divisors (14503603).

55663565 is a wasteful number, since it uses less digits than its factorization.

55663565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268.

The product of its digits is 405000, while the sum is 41.

The square root of 55663565 is about 7460.8019006002. The cubic root of 55663565 is about 381.8185340047.

The spelling of 55663565 in words is "fifty-five million, six hundred sixty-three thousand, five hundred sixty-five".