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12018707543640 = 23357291094526411
BaseRepresentation
bin1010111011100101001011…
…0010110011011001011000
31120112222101101121210020010
42232321102302303121120
53033403303112344030
641321152405401520
72350215530345040
oct256712262633130
946488341553203
1012018707543640
113914118099276
121421380a092a0
136924893a1035
142d79cc388720
1515c97a48b6b0
hexaee52cb3658

12018707543640 has 256 divisors, whose sum is σ = 43019019648000. Its totient is φ = 2628069857280.

The previous prime is 12018707543639. The next prime is 12018707543719. The reversal of 12018707543640 is 4634570781021.

It is a self number, because there is not a number n which added to its sum of digits gives 12018707543640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392035 + ... + 4918445.

It is an arithmetic number, because the mean of its divisors is an integer number (168043045500).

Almost surely, 212018707543640 is an apocalyptic number.

12018707543640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018707543640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21509509824000).

12018707543640 is an abundant number, since it is smaller than the sum of its proper divisors (31000312104360).

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

12018707543640 is a wasteful number, since it uses less digits than its factorization.

12018707543640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526570 (or 4526566 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 12018707543640 in words is "twelve trillion, eighteen billion, seven hundred seven million, five hundred forty-three thousand, six hundred forty".