56644191 has 20 divisors (see below), whose sum is σ = 84869400. Its totient is φ = 37650096.

The previous prime is 56644183. The next prime is 56644199. The reversal of 56644191 is 19144665.

56644191 is a `hidden beast` number, since 5 + 6 + 644 + 1 + 9 + 1 = 666.

56644191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56644183) and next prime (56644199).

It is not a de Polignac number, because 56644191 - 2³ = 56644183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56644199) 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 19 ways as a sum of consecutive naturals, for example, 33105 + ... + 34773.

It is an arithmetic number, because the mean of its divisors is an integer number (4243470).

Almost surely, 2^56644191 is an apocalyptic number.

56644191 is a deficient number, since it is larger than the sum of its proper divisors (28225209).

56644191 is a wasteful number, since it uses less digits than its factorization.

56644191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100 (or 2091 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 56644191 is about 7526.2335201613. The cubic root of 56644191 is about 384.0476625409.

The spelling of 56644191 in words is "fifty-six million, six hundred forty-four thousand, one hundred ninety-one".