56516609 has 8 divisors (see below), whose sum is σ = 57731520. Its totient is φ = 55314576.

The previous prime is 56516591. The next prime is 56516657. The reversal of 56516609 is 90661565.

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 56516609 - 2¹² = 56512513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56516699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5924 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (7216440).

It is a Proth number, since it is equal to 6899 ⋅ 2¹³ + 1 and 6899 < 2¹³.

Almost surely, 2^56516609 is an apocalyptic number.

It is an amenable number.

56516609 is a deficient number, since it is larger than the sum of its proper divisors (1214911).

56516609 is a wasteful number, since it uses less digits than its factorization.

56516609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 56516609 is about 7517.7529222501. The cubic root of 56516609 is about 383.7591104374.

The spelling of 56516609 in words is "fifty-six million, five hundred sixteen thousand, six hundred nine".