56636191 has 4 divisors (see below), whose sum is σ = 56678584. Its totient is φ = 56593800.

The previous prime is 56636161. The next prime is 56636201. The reversal of 56636191 is 19163665.

56636191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56636191 - 2⁹ = 56635679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56636191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56636141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19125 + ... + 21886.

It is an arithmetic number, because the mean of its divisors is an integer number (14169646).

Almost surely, 2^56636191 is an apocalyptic number.

56636191 is a deficient number, since it is larger than the sum of its proper divisors (42393).

56636191 is a wasteful number, since it uses less digits than its factorization.

56636191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42392.

The product of its digits is 29160, while the sum is 37.

The square root of 56636191 is about 7525.7020270537. The cubic root of 56636191 is about 384.0295816874.

The spelling of 56636191 in words is "fifty-six million, six hundred thirty-six thousand, one hundred ninety-one".