56643505 has 4 divisors (see below), whose sum is σ = 67972212. Its totient is φ = 45314800.

The previous prime is 56643497. The next prime is 56643523. The reversal of 56643505 is 50534665.

56643505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 44302336 + 12341169 = 6656^2 + 3513^2 .

It is not a de Polignac number, because 56643505 - 2³ = 56643497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5664346 + ... + 5664355.

It is an arithmetic number, because the mean of its divisors is an integer number (16993053).

Almost surely, 2^56643505 is an apocalyptic number.

It is an amenable number.

56643505 is a deficient number, since it is larger than the sum of its proper divisors (11328707).

56643505 is a wasteful number, since it uses less digits than its factorization.

56643505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11328706.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 56643505 is about 7526.1879460986. The cubic root of 56643505 is about 384.0461121744.

The spelling of 56643505 in words is "fifty-six million, six hundred forty-three thousand, five hundred five".