850409855 has 8 divisors (see below), whose sum is σ = 1020955200. Its totient is φ = 680018976.

The previous prime is 850409851. The next prime is 850409867. The reversal of 850409855 is 558904058.

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

It is a cyclic number.

It is not a de Polignac number, because 850409855 - 2² = 850409851 is a prime.

It is a super-2 number, since 2×850409855² = 1446393842962242050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850409851) 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 7 ways as a sum of consecutive naturals, for example, 26135 + ... + 48824.

It is an arithmetic number, because the mean of its divisors is an integer number (127619400).

Almost surely, 2^850409855 is an apocalyptic number.

850409855 is a deficient number, since it is larger than the sum of its proper divisors (170545345).

850409855 is a wasteful number, since it uses less digits than its factorization.

850409855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77233.

The product of its (nonzero) digits is 288000, while the sum is 44.

The square root of 850409855 is about 29161.7875823825. The cubic root of 850409855 is about 947.4204647305.

The spelling of 850409855 in words is "eight hundred fifty million, four hundred nine thousand, eight hundred fifty-five".