56644641 has 6 divisors (see below), whose sum is σ = 81820050. Its totient is φ = 37763088.

The previous prime is 56644639. The next prime is 56644649. The reversal of 56644641 is 14644665.

56644641 is a `hidden beast` number, since 5 + 6 + 6 + 4 + 4 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48944016 + 7700625 = 6996^2 + 2775^2 .

It is not a de Polignac number, because 56644641 - 2¹ = 56644639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56644596 and 56644605.

It is not an unprimeable number, because it can be changed into a prime (56644649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3146916 + ... + 3146933.

It is an arithmetic number, because the mean of its divisors is an integer number (13636675).

Almost surely, 2^56644641 is an apocalyptic number.

It is an amenable number.

56644641 is a deficient number, since it is larger than the sum of its proper divisors (25175409).

56644641 is a wasteful number, since it uses less digits than its factorization.

56644641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293855 (or 6293852 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 56644641 is about 7526.2634155336. The cubic root of 56644641 is about 384.0486795383.

The spelling of 56644641 in words is "fifty-six million, six hundred forty-four thousand, six hundred forty-one".