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8189116818 = 231780285459
BaseRepresentation
bin1111010000001110…
…00000000110010010
3210010201021020101220
413220013000012102
5113232403214233
63432333105510
7406635226101
oct75007000622
923121236356
108189116818
1135225a7743
121706628296
13a0678986c
14579856038
1532de04eb3
hex1e81c0192

8189116818 has 16 divisors (see below), whose sum is σ = 17341659360. Its totient is φ = 2569134656.

The previous prime is 8189116807. The next prime is 8189116823. The reversal of 8189116818 is 8186119818.

It is a Harshad number since it is a multiple of its sum of digits (51).

8189116818 is a strobogrammatic number because it is the same when read upside-down.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40142628 + ... + 40142831.

It is an arithmetic number, because the mean of its divisors is an integer number (1083853710).

Almost surely, 28189116818 is an apocalyptic number.

8189116818 is an abundant number, since it is smaller than the sum of its proper divisors (9152542542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8189116818 is a wasteful number, since it uses less digits than its factorization.

8189116818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80285481.

The product of its digits is 221184, while the sum is 51.

The square root of 8189116818 is about 90493.7391093992. The cubic root of 8189116818 is about 2015.6371558774.

The spelling of 8189116818 in words is "eight billion, one hundred eighty-nine million, one hundred sixteen thousand, eight hundred eighteen".

Divisors: 1 2 3 6 17 34 51 102 80285459 160570918 240856377 481712754 1364852803 2729705606 4094558409 8189116818