56387565 has 48 divisors (see below), whose sum is σ = 106312752. Its totient is φ = 27482112.

The previous prime is 56387563. The next prime is 56387579. The reversal of 56387565 is 56578365.

56387565 is a `hidden beast` number, since 5 + 6 + 3 + 87 + 565 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 32592681 + 23794884 = 5709^2 + 4878^2 .

It is not a de Polignac number, because 56387565 - 2¹ = 56387563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56387565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56387563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65679 + ... + 66531.

It is an arithmetic number, because the mean of its divisors is an integer number (2214849).

Almost surely, 2^56387565 is an apocalyptic number.

It is an amenable number.

56387565 is a deficient number, since it is larger than the sum of its proper divisors (49925187).

56387565 is a wasteful number, since it uses less digits than its factorization.

56387565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 987 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 56387565 is about 7509.1653996966. The cubic root of 56387565 is about 383.4668096409.

It can be divided in two parts, 5638 and 7565, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 56387565 in words is "fifty-six million, three hundred eighty-seven thousand, five hundred sixty-five".