57443661 has 30 divisors (see below), whose sum is σ = 94337166. Its totient is φ = 34808400.

The previous prime is 57443653. The next prime is 57443677. The reversal of 57443661 is 16634475.

It is a happy number.

57443661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 48024900 + 9418761 = 6930^2 + 3069^2 .

It is not a de Polignac number, because 57443661 - 2³ = 57443653 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57443611) 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 29 ways as a sum of consecutive naturals, for example, 6871 + ... + 12731.

Almost surely, 2^57443661 is an apocalyptic number.

It is an amenable number.

57443661 is a deficient number, since it is larger than the sum of its proper divisors (36893505).

57443661 is a wasteful number, since it uses less digits than its factorization.

57443661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5895 (or 5875 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 57443661 is about 7579.1596499876. The cubic root of 57443661 is about 385.8460306573.

The spelling of 57443661 in words is "fifty-seven million, four hundred forty-three thousand, six hundred sixty-one".