57168066493 has 2 divisors, whose sum is σ = 57168066494. Its totient is φ = 57168066492.

The previous prime is 57168066443. The next prime is 57168066499. The reversal of 57168066493 is 39466086175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49318638084 + 7849428409 = 222078^2 + 88597^2 .

It is a cyclic number.

It is not a de Polignac number, because 57168066493 - 2¹⁷ = 57167935421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57168066499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28584033246 + 28584033247.

It is an arithmetic number, because the mean of its divisors is an integer number (28584033247).

Almost surely, 2^57168066493 is an apocalyptic number.

It is an amenable number.

57168066493 is a deficient number, since it is larger than the sum of its proper divisors (1).

57168066493 is an equidigital number, since it uses as much as digits as its factorization.

57168066493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 57168066493 in words is "fifty-seven billion, one hundred sixty-eight million, sixty-six thousand, four hundred ninety-three".