56555565 has 16 divisors (see below), whose sum is σ = 98715456. Its totient is φ = 27420800.

The previous prime is 56555561. The next prime is 56555567.

56555565 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56555565 - 2² = 56555561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56555561) 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, 171216 + ... + 171545.

It is an arithmetic number, because the mean of its divisors is an integer number (6169716).

Almost surely, 2^56555565 is an apocalyptic number.

56555565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56555565 is a deficient number, since it is larger than the sum of its proper divisors (42159891).

56555565 is a wasteful number, since it uses less digits than its factorization.

56555565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342780.

The product of its digits is 562500, while the sum is 42.

The square root of 56555565 is about 7520.3434097121. The cubic root of 56555565 is about 383.8472632042.

The spelling of 56555565 in words is "fifty-six million, five hundred fifty-five thousand, five hundred sixty-five".