57168455381 has 2 divisors, whose sum is σ = 57168455382. Its totient is φ = 57168455380.

The previous prime is 57168455339. The next prime is 57168455401. The reversal of 57168455381 is 18355486175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57045023281 + 123432100 = 238841^2 + 11110^2 .

It is a cyclic number.

It is not a de Polignac number, because 57168455381 - 2⁶ = 57168455317 is a prime.

It is a super-2 number, since 2×57168455381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57168451381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28584227690 + 28584227691.

It is an arithmetic number, because the mean of its divisors is an integer number (28584227691).

Almost surely, 2^57168455381 is an apocalyptic number.

It is an amenable number.

57168455381 is a deficient number, since it is larger than the sum of its proper divisors (1).

57168455381 is an equidigital number, since it uses as much as digits as its factorization.

57168455381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032000, while the sum is 53.

The spelling of 57168455381 in words is "fifty-seven billion, one hundred sixty-eight million, four hundred fifty-five thousand, three hundred eighty-one".