57171665687 has 2 divisors, whose sum is σ = 57171665688. Its totient is φ = 57171665686.

The previous prime is 57171665659. The next prime is 57171665723. The reversal of 57171665687 is 78656617175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57171665687 - 2⁶ = 57171665623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57171665647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28585832843 + 28585832844.

It is an arithmetic number, because the mean of its divisors is an integer number (28585832844).

Almost surely, 2^57171665687 is an apocalyptic number.

57171665687 is a deficient number, since it is larger than the sum of its proper divisors (1).

57171665687 is an equidigital number, since it uses as much as digits as its factorization.

57171665687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14817600, while the sum is 59.

The spelling of 57171665687 in words is "fifty-seven billion, one hundred seventy-one million, six hundred sixty-five thousand, six hundred eighty-seven".