57128494085 has 16 divisors (see below), whose sum is σ = 73834380144. Its totient is φ = 42183316992.

The previous prime is 57128494081. The next prime is 57128494091. The reversal of 57128494085 is 58049482175.

It can be written as a sum of positive squares in 8 ways, for example, as 6739917409 + 50388576676 = 82097^2 + 224474^2 .

It is a cyclic number.

It is not a de Polignac number, because 57128494085 - 2² = 57128494081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57128494081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808019 + ... + 875871.

It is an arithmetic number, because the mean of its divisors is an integer number (4614648759).

Almost surely, 2^57128494085 is an apocalyptic number.

It is an amenable number.

57128494085 is a deficient number, since it is larger than the sum of its proper divisors (16705886059).

57128494085 is a wasteful number, since it uses less digits than its factorization.

57128494085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80824.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 57128494085 in words is "fifty-seven billion, one hundred twenty-eight million, four hundred ninety-four thousand, eighty-five".