57657643 has 4 divisors (see below), whose sum is σ = 57737680. Its totient is φ = 57577608.

The previous prime is 57657637. The next prime is 57657653. The reversal of 57657643 is 34675675.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57657643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57657643.

It is not an unprimeable number, because it can be changed into a prime (57657623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38928 + ... + 40381.

It is an arithmetic number, because the mean of its divisors is an integer number (14434420).

Almost surely, 2^57657643 is an apocalyptic number.

57657643 is a deficient number, since it is larger than the sum of its proper divisors (80037).

57657643 is an equidigital number, since it uses as much as digits as its factorization.

57657643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80036.

The product of its digits is 529200, while the sum is 43.

The square root of 57657643 is about 7593.2630008449. The cubic root of 57657643 is about 386.3245389113.

The spelling of 57657643 in words is "fifty-seven million, six hundred fifty-seven thousand, six hundred forty-three".