855944881 has 8 divisors (see below), whose sum is σ = 935929728. Its totient is φ = 776322000.

The previous prime is 855944867. The next prime is 855944893. The reversal of 855944881 is 188449558.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855944881 is a prime.

It is a super-2 number, since 2×855944881² = 1465283278620208322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855944861) 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, 85530 + ... + 95011.

It is an arithmetic number, because the mean of its divisors is an integer number (116991216).

Almost surely, 2^855944881 is an apocalyptic number.

It is an amenable number.

855944881 is a deficient number, since it is larger than the sum of its proper divisors (79984847).

855944881 is a wasteful number, since it uses less digits than its factorization.

855944881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180983.

The product of its digits is 1843200, while the sum is 52.

The square root of 855944881 is about 29256.5356971737. The cubic root of 855944881 is about 949.4714995776.

The spelling of 855944881 in words is "eight hundred fifty-five million, nine hundred forty-four thousand, eight hundred eighty-one".