56505565 has 8 divisors (see below), whose sum is σ = 67855320. Its totient is φ = 45172032.

The previous prime is 56505557. The next prime is 56505607. The reversal of 56505565 is 56550565.

It can be written as a sum of positive squares in 4 ways, for example, as 18818244 + 37687321 = 4338^2 + 6139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56505565 - 2³ = 56505557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5787 + ... + 12103.

It is an arithmetic number, because the mean of its divisors is an integer number (8481915).

Almost surely, 2^56505565 is an apocalyptic number.

It is an amenable number.

56505565 is a deficient number, since it is larger than the sum of its proper divisors (11349755).

56505565 is a wasteful number, since it uses less digits than its factorization.

56505565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 112500, while the sum is 37.

The square root of 56505565 is about 7517.0183583652. The cubic root of 56505565 is about 383.7341118173.

The spelling of 56505565 in words is "fifty-six million, five hundred five thousand, five hundred sixty-five".