216057578887 has 2 divisors, whose sum is σ = 216057578888. Its totient is φ = 216057578886.

The previous prime is 216057578881. The next prime is 216057578909. The reversal of 216057578887 is 788875750612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216057578887 - 2¹⁹ = 216057054599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216057578881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108028789443 + 108028789444.

It is an arithmetic number, because the mean of its divisors is an integer number (108028789444).

Almost surely, 2^216057578887 is an apocalyptic number.

216057578887 is a deficient number, since it is larger than the sum of its proper divisors (1).

216057578887 is an equidigital number, since it uses as much as digits as its factorization.

216057578887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52684800, while the sum is 64.

The spelling of 216057578887 in words is "two hundred sixteen billion, fifty-seven million, five hundred seventy-eight thousand, eight hundred eighty-seven".