56644481 has 2 divisors, whose sum is σ = 56644482. Its totient is φ = 56644480.

The previous prime is 56644457. The next prime is 56644499. The reversal of 56644481 is 18444665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29604481 + 27040000 = 5441^2 + 5200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56644481 is a prime.

It is a super-2 number, since 2×56644481² = 6417194455518722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56644451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28322240 + 28322241.

It is an arithmetic number, because the mean of its divisors is an integer number (28322241).

Almost surely, 2^56644481 is an apocalyptic number.

It is an amenable number.

56644481 is a deficient number, since it is larger than the sum of its proper divisors (1).

56644481 is an equidigital number, since it uses as much as digits as its factorization.

56644481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 56644481 is about 7526.2527860815. The cubic root of 56644481 is about 384.0483179398.

The spelling of 56644481 in words is "fifty-six million, six hundred forty-four thousand, four hundred eighty-one".