855489836181 has 8 divisors (see below), whose sum is σ = 1141028712544. Its totient is φ = 570138758640.

The previous prime is 855489836177. The next prime is 855489836191. The reversal of 855489836181 is 181638984558.

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

It is not a de Polignac number, because 855489836181 - 2² = 855489836177 is a prime.

It is a super-2 number, since 2×855489836181² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855489836161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46939075 + ... + 46957296.

It is an arithmetic number, because the mean of its divisors is an integer number (142628589068).

Almost surely, 2^855489836181 is an apocalyptic number.

It is an amenable number.

855489836181 is a deficient number, since it is larger than the sum of its proper divisors (285538876363).

855489836181 is a wasteful number, since it uses less digits than its factorization.

855489836181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93899411.

The product of its digits is 66355200, while the sum is 66.

The spelling of 855489836181 in words is "eight hundred fifty-five billion, four hundred eighty-nine million, eight hundred thirty-six thousand, one hundred eighty-one".