8555551385 has 24 divisors (see below), whose sum is σ = 10994352264. Its totient is φ = 6387096320.

The previous prime is 8555551369. The next prime is 8555551397. The reversal of 8555551385 is 5831555558.

It can be written as a sum of positive squares in 4 ways, for example, as 2446096 + 8553105289 = 1564^2 + 92483^2 .

It is not a de Polignac number, because 8555551385 - 2⁴ = 8555551369 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68999 + ... + 147891.

It is an arithmetic number, because the mean of its divisors is an integer number (458098011).

Almost surely, 2^8555551385 is an apocalyptic number.

It is an amenable number.

8555551385 is a deficient number, since it is larger than the sum of its proper divisors (2438800879).

8555551385 is a wasteful number, since it uses less digits than its factorization.

8555551385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78985 (or 78962 counting only the distinct ones).

The product of its digits is 3000000, while the sum is 50.

The square root of 8555551385 is about 92496.2236256162. The cubic root of 8555551385 is about 2045.2638142206.

The spelling of 8555551385 in words is "eight billion, five hundred fifty-five million, five hundred fifty-one thousand, three hundred eighty-five".