855998899558 has 8 divisors (see below), whose sum is σ = 1400725472040. Its totient is φ = 389090408880.

The previous prime is 855998899447. The next prime is 855998899573.

It is a happy number.

855998899558 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 19454520423 + ... + 19454520466.

It is an arithmetic number, because the mean of its divisors is an integer number (175090684005).

Almost surely, 2^855998899558 is an apocalyptic number.

855998899558 is a deficient number, since it is larger than the sum of its proper divisors (544726572482).

855998899558 is a wasteful number, since it uses less digits than its factorization.

855998899558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38909040902.

The product of its digits is 16796160000, while the sum is 88.

The spelling of 855998899558 in words is "eight hundred fifty-five billion, nine hundred ninety-eight million, eight hundred ninety-nine thousand, five hundred fifty-eight".