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807272808080 = 24510199910001
BaseRepresentation
bin10111011111101010011…
…01010111111010010000
32212011201020012200002212
423233311031113322100
5101211243314324310
61414504521531252
7112215654436064
oct13576515277220
92764636180085
10807272808080
112913a9500092
12110556043b28
135b18294c5cb
142b102217aa4
1515eeba48205
hexbbf5357e90

807272808080 has 40 divisors (see below), whose sum is σ = 1895492557944. Its totient is φ = 319712000000.

The previous prime is 807272808031. The next prime is 807272808109. The reversal of 807272808080 is 80808272708.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 280870320784 + 526402487296 = 529972^2 + 725536^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 49946921 + ... + 49963080.

Almost surely, 2807272808080 is an apocalyptic number.

807272808080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

807272808080 is an abundant number, since it is smaller than the sum of its proper divisors (1088219749864).

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

807272808080 is a wasteful number, since it uses less digits than its factorization.

807272808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99910115 (or 99910109 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 50.

The spelling of 807272808080 in words is "eight hundred seven billion, two hundred seventy-two million, eight hundred eight thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 101 202 404 505 808 1010 1616 2020 4040 8080 99910001 199820002 399640004 499550005 799280008 999100010 1598560016 1998200020 3996400040 7992800080 10090910101 20181820202 40363640404 50454550505 80727280808 100909101010 161454561616 201818202020 403636404040 807272808080