56516605 has 4 divisors (see below), whose sum is σ = 67819932. Its totient is φ = 45213280.

The previous prime is 56516591. The next prime is 56516657. The reversal of 56516605 is 50661565.

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 13980121 + 42536484 = 3739^2 + 6522^2 .

It is not a de Polignac number, because 56516605 - 2¹⁹ = 55992317 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, 5651656 + ... + 5651665.

It is an arithmetic number, because the mean of its divisors is an integer number (16954983).

Almost surely, 2^56516605 is an apocalyptic number.

It is an amenable number.

56516605 is a deficient number, since it is larger than the sum of its proper divisors (11303327).

56516605 is a wasteful number, since it uses less digits than its factorization.

56516605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303326.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 56516605 is about 7517.7526562132. The cubic root of 56516605 is about 383.7591013838.

It can be divided in two parts, 56516 and 605, that added together give a square (57121 = 239²).

The spelling of 56516605 in words is "fifty-six million, five hundred sixteen thousand, six hundred five".