57661443 has 32 divisors (see below), whose sum is σ = 99025920. Its totient is φ = 32477760.

The previous prime is 57661441. The next prime is 57661453. The reversal of 57661443 is 34416675.

It is a happy number.

It is not a de Polignac number, because 57661443 - 2¹ = 57661441 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 57661398 and 57661407.

It is not an unprimeable number, because it can be changed into a prime (57661441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11271 + ... + 15567.

It is an arithmetic number, because the mean of its divisors is an integer number (3094560).

Almost surely, 2^57661443 is an apocalyptic number.

57661443 is a deficient number, since it is larger than the sum of its proper divisors (41364477).

57661443 is a wasteful number, since it uses less digits than its factorization.

57661443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384 (or 4378 counting only the distinct ones).

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

The square root of 57661443 is about 7593.5132185307. The cubic root of 57661443 is about 386.3330257942. Note that the first 3 decimals are identical.

The spelling of 57661443 in words is "fifty-seven million, six hundred sixty-one thousand, four hundred forty-three".