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BaseRepresentation
bin100101111011111011…
…0001001111100101100
321210021121121212120100
41023313312021330230
52313321200031304
6101231540551100
75612562002043
oct1136766117454
9253247555510
1081467580204
113160636388a
12139573b2490
1378b41b587a
143d2ba3d55a
1521bc262439
hex12f7d89f2c

81467580204 has 72 divisors (see below), whose sum is σ = 211610982128. Its totient is φ = 26407762560.

The previous prime is 81467580199. The next prime is 81467580221. The reversal of 81467580204 is 40208576418.

81467580204 is a `hidden beast` number, since 8 + 1 + 4 + 67 + 580 + 2 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 81467580204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2631294 + ... + 2662074.

Almost surely, 281467580204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81467580204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105805491064).

81467580204 is an abundant number, since it is smaller than the sum of its proper divisors (130143401924).

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

81467580204 is a wasteful number, since it uses less digits than its factorization.

81467580204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32815 (or 32810 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 81467580204 in words is "eighty-one billion, four hundred sixty-seven million, five hundred eighty thousand, two hundred four".