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12873399680 = 27520114687
BaseRepresentation
bin10111111110101000…
…00111110110000000
31020020011120110110202
423333110013312000
5202331042242210
65525225344332
7634005043331
oct137724076600
936204513422
1012873399680
115506775799
1225b33380a8
1312a20a677b
148a1a12288
155052959a5
hex2ff507d80

12873399680 has 32 divisors (see below), whose sum is σ = 30775472640. Its totient is φ = 5149359616.

The previous prime is 12873399673. The next prime is 12873399691. The reversal of 12873399680 is 8699337821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 10056704 + ... + 10057983.

It is an arithmetic number, because the mean of its divisors is an integer number (961733520).

Almost surely, 212873399680 is an apocalyptic number.

12873399680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12873399680 is an abundant number, since it is smaller than the sum of its proper divisors (17902072960).

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

12873399680 is an equidigital number, since it uses as much as digits as its factorization.

12873399680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20114706 (or 20114694 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 12873399680 in words is "twelve billion, eight hundred seventy-three million, three hundred ninety-nine thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 20114687 40229374 80458748 100573435 160917496 201146870 321834992 402293740 643669984 804587480 1287339968 1609174960 2574679936 3218349920 6436699840 12873399680