8219718855 has 48 divisors (see below), whose sum is σ = 14660489376. Its totient is φ = 4258425600.

The previous prime is 8219718853. The next prime is 8219718893. The reversal of 8219718855 is 5588179128.

It is not a de Polignac number, because 8219718855 - 2¹ = 8219718853 is a prime.

It is a super-2 number, since 2×8219718855² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219718853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223824 + ... + 257946.

It is an arithmetic number, because the mean of its divisors is an integer number (305426862).

Almost surely, 2^8219718855 is an apocalyptic number.

8219718855 is a deficient number, since it is larger than the sum of its proper divisors (6440770521).

8219718855 is a wasteful number, since it uses less digits than its factorization.

8219718855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34288 (or 34285 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 54.

The square root of 8219718855 is about 90662.6651659877. The cubic root of 8219718855 is about 2018.1447900576.

The spelling of 8219718855 in words is "eight billion, two hundred nineteen million, seven hundred eighteen thousand, eight hundred fifty-five".