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81696318162 = 23312112081647
BaseRepresentation
bin100110000010101111…
…0101110001011010010
321210212120000222001120
41030011132232023102
52314303224140122
6101310351343110
75621340150414
oct1140536561322
9253776028046
1081696318162
1131713495018
12139bbb21a96
13791c6c2584
143d501829b4
1521d239675c
hex13057ae2d2

81696318162 has 32 divisors (see below), whose sum is σ = 169462800384. Its totient is φ = 26228739600.

The previous prime is 81696318103. The next prime is 81696318173. The reversal of 81696318162 is 26181369618.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1001578 + ... + 1080069.

It is an arithmetic number, because the mean of its divisors is an integer number (5295712512).

Almost surely, 281696318162 is an apocalyptic number.

81696318162 is an abundant number, since it is smaller than the sum of its proper divisors (87766482222).

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

81696318162 is a wasteful number, since it uses less digits than its factorization.

81696318162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081894.

The product of its digits is 746496, while the sum is 51.

The spelling of 81696318162 in words is "eighty-one billion, six hundred ninety-six million, three hundred eighteen thousand, one hundred sixty-two".

Divisors: 1 2 3 6 31 62 93 186 211 422 633 1266 6541 13082 19623 39246 2081647 4163294 6244941 12489882 64531057 129062114 193593171 387186342 439227517 878455034 1317682551 2635365102 13616053027 27232106054 40848159081 81696318162