56985611 has 4 divisors (see below), whose sum is σ = 57004272. Its totient is φ = 56966952.

The previous prime is 56985601. The next prime is 56985629. The reversal of 56985611 is 11658965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56985611 - 2¹⁸ = 56723467 is a prime.

It is a super-2 number, since 2×56985611² = 6494719722086642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56985601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (14251068).

Almost surely, 2^56985611 is an apocalyptic number.

56985611 is a deficient number, since it is larger than the sum of its proper divisors (18661).

56985611 is a wasteful number, since it uses less digits than its factorization.

56985611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18660.

The product of its digits is 64800, while the sum is 41.

The square root of 56985611 is about 7548.8814403195. The cubic root of 56985611 is about 384.8177267282.

The spelling of 56985611 in words is "fifty-six million, nine hundred eighty-five thousand, six hundred eleven".