57078861857 has 2 divisors, whose sum is σ = 57078861858. Its totient is φ = 57078861856.

The previous prime is 57078861811. The next prime is 57078861871. The reversal of 57078861857 is 75816887075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49939287841 + 7139574016 = 223471^2 + 84496^2 .

It is a cyclic number.

It is not a de Polignac number, because 57078861857 - 2⁶ = 57078861793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57078861857.

It is not a weakly prime, because it can be changed into another prime (57078861877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28539430928 + 28539430929.

It is an arithmetic number, because the mean of its divisors is an integer number (28539430929).

Almost surely, 2^57078861857 is an apocalyptic number.

It is an amenable number.

57078861857 is a deficient number, since it is larger than the sum of its proper divisors (1).

57078861857 is an equidigital number, since it uses as much as digits as its factorization.

57078861857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26342400, while the sum is 62.

The spelling of 57078861857 in words is "fifty-seven billion, seventy-eight million, eight hundred sixty-one thousand, eight hundred fifty-seven".