856988889658 has 16 divisors (see below), whose sum is σ = 1402467929280. Its totient is φ = 389506384000.

The previous prime is 856988889643. The next prime is 856988889677.

856988889658 is nontrivially palindromic in base 10.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1442518 + ... + 1948033.

It is an arithmetic number, because the mean of its divisors is an integer number (87654245580).

Almost surely, 2^856988889658 is an apocalyptic number.

856988889658 is a deficient number, since it is larger than the sum of its proper divisors (545479039622).

856988889658 is a wasteful number, since it uses less digits than its factorization.

856988889658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402053.

The product of its digits is 19110297600, while the sum is 88.

The spelling of 856988889658 in words is "eight hundred fifty-six billion, nine hundred eighty-eight million, eight hundred eighty-nine thousand, six hundred fifty-eight".