56616645 has 8 divisors (see below), whose sum is σ = 90586656. Its totient is φ = 30195536.

The previous prime is 56616629. The next prime is 56616649. The reversal of 56616645 is 54661665.

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 56616645 - 2⁴ = 56616629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56616649) 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 7 ways as a sum of consecutive naturals, for example, 1887207 + ... + 1887236.

It is an arithmetic number, because the mean of its divisors is an integer number (11323332).

Almost surely, 2^56616645 is an apocalyptic number.

It is an amenable number.

56616645 is a deficient number, since it is larger than the sum of its proper divisors (33970011).

56616645 is a wasteful number, since it uses less digits than its factorization.

56616645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774451.

The product of its digits is 129600, while the sum is 39.

The square root of 56616645 is about 7524.4032986012. The cubic root of 56616645 is about 383.9853984791.

The spelling of 56616645 in words is "fifty-six million, six hundred sixteen thousand, six hundred forty-five".