56606645 has 4 divisors (see below), whose sum is σ = 67927980. Its totient is φ = 45285312.

The previous prime is 56606639. The next prime is 56606647. The reversal of 56606645 is 54660665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54660665 = 5 ⋅10932133.

It can be written as a sum of positive squares in 2 ways, for example, as 40462321 + 16144324 = 6361^2 + 4018^2 .

It is a cyclic number.

It is not a de Polignac number, because 56606645 - 2⁴ = 56606629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56606599 and 56606608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56606647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5660660 + ... + 5660669.

It is an arithmetic number, because the mean of its divisors is an integer number (16981995).

Almost surely, 2^56606645 is an apocalyptic number.

It is an amenable number.

56606645 is a deficient number, since it is larger than the sum of its proper divisors (11321335).

56606645 is a wasteful number, since it uses less digits than its factorization.

56606645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321334.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 56606645 is about 7523.7387647366. The cubic root of 56606645 is about 383.9627898153.

The spelling of 56606645 in words is "fifty-six million, six hundred six thousand, six hundred forty-five".