55643786 has 16 divisors (see below), whose sum is σ = 91810368. Its totient is φ = 25291420.

The previous prime is 55643747. The next prime is 55643801. The reversal of 55643786 is 68734655.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7790 + ... + 13113.

It is an arithmetic number, because the mean of its divisors is an integer number (5738148).

Almost surely, 2^55643786 is an apocalyptic number.

55643786 is a deficient number, since it is larger than the sum of its proper divisors (36166582).

55643786 is a wasteful number, since it uses less digits than its factorization.

55643786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20938 (or 20916 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 55643786 is about 7459.4762550731. The cubic root of 55643786 is about 381.7733046376.

The spelling of 55643786 in words is "fifty-five million, six hundred forty-three thousand, seven hundred eighty-six".