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8081111808 = 2832711241101
BaseRepresentation
bin1111000011010101…
…11111101100000000
3202212012001000101100
413201222333230000
5113022231034213
63413514134400
7404154213510
oct74152775400
922765030340
108081111808
113477638a00
121696421400
139ba2a2583
1456937d840
153246bd773
hex1e1abfb00

8081111808 has 648 divisors, whose sum is σ = 30279963168. Its totient is φ = 2027520000.

The previous prime is 8081111791. The next prime is 8081111827.

8081111808 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

8081111808 is a strobogrammatic number because it is the same when read upside-down.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 80010958 + ... + 80011058.

Almost surely, 28081111808 is an apocalyptic number.

8081111808 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8081111808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15139981584).

8081111808 is an abundant number, since it is smaller than the sum of its proper divisors (22198851360).

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

8081111808 is a wasteful number, since it uses less digits than its factorization.

8081111808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 36.

The square root of 8081111808 is about 89895.0043550808. The cubic root of 8081111808 is about 2006.7366009605.

The spelling of 8081111808 in words is "eight billion, eighty-one million, one hundred eleven thousand, eight hundred eight".