55116565 has 16 divisors (see below), whose sum is σ = 76503168. Its totient is φ = 37336896.

The previous prime is 55116563. The next prime is 55116653. The reversal of 55116565 is 56561155.

It is a cyclic number.

It is not a de Polignac number, because 55116565 - 2¹ = 55116563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55116565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55116563) 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, 6582 + ... + 12391.

It is an arithmetic number, because the mean of its divisors is an integer number (4781448).

Almost surely, 2^55116565 is an apocalyptic number.

It is an amenable number.

55116565 is a deficient number, since it is larger than the sum of its proper divisors (21386603).

55116565 is a wasteful number, since it uses less digits than its factorization.

55116565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068.

The product of its digits is 22500, while the sum is 34.

The square root of 55116565 is about 7424.0531382797. The cubic root of 55116565 is about 380.5637178075.

The spelling of 55116565 in words is "fifty-five million, one hundred sixteen thousand, five hundred sixty-five".