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12987455005180 = 2255939232805587
BaseRepresentation
bin1011110011111110000010…
…1001000110000111111100
31200222120220001212202120201
42330333200221012013330
53200241301440131210
643342204321453244
72510212146040435
oct274774051060774
950876801782521
1012987455005180
114157a4884a487
1215590804a1224
13732933946666
1432c84bc9c48c
15177c7816153a
hexbcfe0a461fc

12987455005180 has 48 divisors (see below), whose sum is σ = 27743000826240. Its totient is φ = 5105627847488.

The previous prime is 12987455005163. The next prime is 12987455005193. The reversal of 12987455005180 is 8150055478921.

It is a congruent number.

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, 3226347 + ... + 6031933.

It is an arithmetic number, because the mean of its divisors is an integer number (577979183880).

Almost surely, 212987455005180 is an apocalyptic number.

12987455005180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12987455005180 is an abundant number, since it is smaller than the sum of its proper divisors (14755545821060).

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

12987455005180 is a wasteful number, since it uses less digits than its factorization.

12987455005180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809578 (or 2809576 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 55.

The spelling of 12987455005180 in words is "twelve trillion, nine hundred eighty-seven billion, four hundred fifty-five million, five thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 59 118 236 295 590 1180 3923 7846 15692 19615 39230 78460 231457 462914 925828 1157285 2314570 2805587 4629140 5611174 11222348 14027935 28055870 56111740 165529633 331059266 662118532 827648165 1655296330 3310592660 11006317801 22012635602 44025271204 55031589005 110063178010 220126356020 649372750259 1298745500518 2597491001036 3246863751295 6493727502590 12987455005180