885555881 has 6 divisors (see below), whose sum is σ = 1030136490. Its totient is φ = 759047856.

The previous prime is 885555841. The next prime is 885555899. The reversal of 885555881 is 188555588.

It can be written as a sum of positive squares in only one way, i.e., 600250000 + 285305881 = 24500^2 + 16891^2 .

It is not a de Polignac number, because 885555881 - 2¹⁸ = 885293737 is a prime.

It is a super-2 number, since 2×885555881² = 1568418436747372322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (885555841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9036236 + ... + 9036333.

It is an arithmetic number, because the mean of its divisors is an integer number (171689415).

Almost surely, 2^885555881 is an apocalyptic number.

It is an amenable number.

885555881 is a deficient number, since it is larger than the sum of its proper divisors (144580609).

885555881 is a wasteful number, since it uses less digits than its factorization.

885555881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18072583 (or 18072576 counting only the distinct ones).

The product of its digits is 2560000, while the sum is 53.

The square root of 885555881 is about 29758.2909623520. The cubic root of 885555881 is about 960.2964510526.

The spelling of 885555881 in words is "eight hundred eighty-five million, five hundred fifty-five thousand, eight hundred eighty-one".