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12678235836860 = 2251171278085919
BaseRepresentation
bin1011100001111110000110…
…1111100101000110111100
31122220000202001110110102002
42320133201233211012330
53130210011333234420
642544145013521432
72445654334343246
oct270374157450674
948800661413362
1012678235836860
11404889a677610
121509163643278
1370c724b2b789
1431b8b65b3096
1516ebcb432075
hexb87e1be51bc

12678235836860 has 48 divisors (see below), whose sum is σ = 29048764631040. Its totient is φ = 4609620133440.

The previous prime is 12678235836839. The next prime is 12678235836869. The reversal of 12678235836860 is 6863853287621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678235836869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2475020 + ... + 5610899.

It is an arithmetic number, because the mean of its divisors is an integer number (605182596480).

Almost surely, 212678235836860 is an apocalyptic number.

12678235836860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12678235836860 is an abundant number, since it is smaller than the sum of its proper divisors (16370528794180).

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

12678235836860 is a wasteful number, since it uses less digits than its factorization.

12678235836860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093066 (or 8093064 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 65.

The spelling of 12678235836860 in words is "twelve trillion, six hundred seventy-eight billion, two hundred thirty-five million, eight hundred thirty-six thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 7127 14254 28508 35635 71270 78397 142540 156794 313588 391985 783970 1567940 8085919 16171838 32343676 40429595 80859190 88945109 161718380 177890218 355780436 444725545 889451090 1778902180 57628344713 115256689426 230513378852 288141723565 576283447130 633911791843 1152566894260 1267823583686 2535647167372 3169558959215 6339117918430 12678235836860