56643605 has 8 divisors (see below), whose sum is σ = 68736600. Its totient is φ = 44805376.

The previous prime is 56643589. The next prime is 56643659. The reversal of 56643605 is 50634665.

It can be written as a sum of positive squares in 4 ways, for example, as 228484 + 56415121 = 478^2 + 7511^2 .

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 56643605 - 2⁴ = 56643589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63200 + ... + 64089.

It is an arithmetic number, because the mean of its divisors is an integer number (8592075).

Almost surely, 2^56643605 is an apocalyptic number.

It is an amenable number.

56643605 is a deficient number, since it is larger than the sum of its proper divisors (12092995).

56643605 is a wasteful number, since it uses less digits than its factorization.

56643605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127383.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 56643605 is about 7526.1945895652. The cubic root of 56643605 is about 384.0463381761.

The spelling of 56643605 in words is "fifty-six million, six hundred forty-three thousand, six hundred five".