9855555 has 16 divisors (see below), whose sum is σ = 15924480. Its totient is φ = 5204448.

The previous prime is 9855553. The next prime is 9855577. The reversal of 9855555 is 5555589.

9855555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9855555 - 2¹ = 9855553 is a prime.

9855555 is a modest number, since divided by 5555 gives 985 as remainder.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9855553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645 + ... + 4734.

It is an arithmetic number, because the mean of its divisors is an integer number (995280).

Almost surely, 2^9855555 is an apocalyptic number.

9855555 is a deficient number, since it is larger than the sum of its proper divisors (6068925).

9855555 is a wasteful number, since it uses less digits than its factorization.

9855555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490.

The product of its digits is 225000, while the sum is 42.

The square root of 9855555 is about 3139.3558256432. The cubic root of 9855555 is about 214.4011095932.

The spelling of 9855555 in words is "nine million, eight hundred fifty-five thousand, five hundred fifty-five".