57644491 has 2 divisors, whose sum is σ = 57644492. Its totient is φ = 57644490.

The previous prime is 57644473. The next prime is 57644497. The reversal of 57644491 is 19444675.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57644491 is a prime.

It is not a weakly prime, because it can be changed into another prime (57644497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28822245 + 28822246.

It is an arithmetic number, because the mean of its divisors is an integer number (28822246).

Almost surely, 2^57644491 is an apocalyptic number.

57644491 is a deficient number, since it is larger than the sum of its proper divisors (1).

57644491 is an equidigital number, since it uses as much as digits as its factorization.

57644491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 57644491 is about 7592.3969206042. The cubic root of 57644491 is about 386.2951624838.

The spelling of 57644491 in words is "fifty-seven million, six hundred forty-four thousand, four hundred ninety-one".