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12668180390 = 251379246847
BaseRepresentation
bin10111100110001010…
…10001011110100110
31012200212102020112022
423303011101132212
5201421023233030
65453015023142
7625633520345
oct136305213646
935625366468
1012668180390
115410948478
12255666aab2
13126b712938
14882671b5c
154e2259de5
hex2f31517a6

12668180390 has 16 divisors (see below), whose sum is σ = 22969170432. Its totient is φ = 5030284224.

The previous prime is 12668180381. The next prime is 12668180431. The reversal of 12668180390 is 9308186621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4622054 + ... + 4624793.

It is an arithmetic number, because the mean of its divisors is an integer number (1435573152).

Almost surely, 212668180390 is an apocalyptic number.

12668180390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12668180390 is a deficient number, since it is larger than the sum of its proper divisors (10300990042).

12668180390 is a wasteful number, since it uses less digits than its factorization.

12668180390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246991.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 12668180390 in words is "twelve billion, six hundred sixty-eight million, one hundred eighty thousand, three hundred ninety".

Divisors: 1 2 5 10 137 274 685 1370 9246847 18493694 46234235 92468470 1266818039 2533636078 6334090195 12668180390