56646787 has 4 divisors (see below), whose sum is σ = 57148200. Its totient is φ = 56145376.

The previous prime is 56646757. The next prime is 56646823. The reversal of 56646787 is 78764665.

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 56646787 - 2⁷ = 56646659 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 56646787.

It is not an unprimeable number, because it can be changed into a prime (56646757) 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, 250537 + ... + 250762.

It is an arithmetic number, because the mean of its divisors is an integer number (14287050).

Almost surely, 2^56646787 is an apocalyptic number.

56646787 is a deficient number, since it is larger than the sum of its proper divisors (501413).

56646787 is a wasteful number, since it uses less digits than its factorization.

56646787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501412.

The product of its digits is 1693440, while the sum is 49.

The square root of 56646787 is about 7526.4059816090. The cubic root of 56646787 is about 384.0535294120.

The spelling of 56646787 in words is "fifty-six million, six hundred forty-six thousand, seven hundred eighty-seven".