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72805861676 = 2261298384679
BaseRepresentation
bin100001111001110010…
…0010100100100101100
320221220222001222111102
41003303210110210230
52143101300033201
653240242142232
75155124420252
oct1036344244454
9227828058442
1072805861676
1128971013519
121213a651978
136b33847932
1437495245d2
151d61b0726b
hex10f391492c

72805861676 has 12 divisors (see below), whose sum is σ = 129498951120. Its totient is φ = 35806161360.

The previous prime is 72805861669. The next prime is 72805861697. The reversal of 72805861676 is 67616850827.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149192096 + ... + 149192583.

It is an arithmetic number, because the mean of its divisors is an integer number (10791579260).

Almost surely, 272805861676 is an apocalyptic number.

It is an amenable number.

72805861676 is a deficient number, since it is larger than the sum of its proper divisors (56693089444).

72805861676 is a wasteful number, since it uses less digits than its factorization.

72805861676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298384744 (or 298384742 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 72805861676 in words is "seventy-two billion, eight hundred five million, eight hundred sixty-one thousand, six hundred seventy-six".

Divisors: 1 2 4 61 122 244 298384679 596769358 1193538716 18201465419 36402930838 72805861676