57085931887 has 2 divisors, whose sum is σ = 57085931888. Its totient is φ = 57085931886.

The previous prime is 57085931869. The next prime is 57085931941. The reversal of 57085931887 is 78813958075.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57085931887 - 2¹⁵ = 57085899119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57085931807) 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, 28542965943 + 28542965944.

It is an arithmetic number, because the mean of its divisors is an integer number (28542965944).

Almost surely, 2^57085931887 is an apocalyptic number.

57085931887 is a deficient number, since it is larger than the sum of its proper divisors (1).

57085931887 is an equidigital number, since it uses as much as digits as its factorization.

57085931887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 57085931887 in words is "fifty-seven billion, eighty-five million, nine hundred thirty-one thousand, eight hundred eighty-seven".