8018644855 has 48 divisors (see below), whose sum is σ = 10964064384. Its totient is φ = 5593835520.

The previous prime is 8018644849. The next prime is 8018644861. The reversal of 8018644855 is 5584468108.

It is an interprime number because it is at equal distance from previous prime (8018644849) and next prime (8018644861).

It is not a de Polignac number, because 8018644855 - 2¹³ = 8018636663 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8018644799 and 8018644808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2567695 + ... + 2570815.

It is an arithmetic number, because the mean of its divisors is an integer number (228418008).

Almost surely, 2^8018644855 is an apocalyptic number.

8018644855 is a deficient number, since it is larger than the sum of its proper divisors (2945419529).

8018644855 is a wasteful number, since it uses less digits than its factorization.

8018644855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 49.

The square root of 8018644855 is about 89546.8863501127. The cubic root of 8018644855 is about 2001.5525324264.

The spelling of 8018644855 in words is "eight billion, eighteen million, six hundred forty-four thousand, eight hundred fifty-five".