55567565 has 4 divisors (see below), whose sum is σ = 66681084. Its totient is φ = 44454048.

The previous prime is 55567559. The next prime is 55567601. The reversal of 55567565 is 56576555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43533604 + 12033961 = 6598^2 + 3469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55567565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5556752 + ... + 5556761.

It is an arithmetic number, because the mean of its divisors is an integer number (16670271).

Almost surely, 2^55567565 is an apocalyptic number.

It is an amenable number.

55567565 is a deficient number, since it is larger than the sum of its proper divisors (11113519).

55567565 is a wasteful number, since it uses less digits than its factorization.

55567565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11113518.

The product of its digits is 787500, while the sum is 44.

The square root of 55567565 is about 7454.3654994909. The cubic root of 55567565 is about 381.5989069677.

The spelling of 55567565 in words is "fifty-five million, five hundred sixty-seven thousand, five hundred sixty-five".