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12690270680 = 235317256767
BaseRepresentation
bin10111101000110011…
…00010100111011000
31012202101222112201012
423310121202213120
5201442202130210
65455124313052
7626322343463
oct136431424730
935671875635
1012690270680
11542236620a
122561b42788
131273178609
148855822da
154e4170305
hex2f46629d8

12690270680 has 16 divisors (see below), whose sum is σ = 28553109120. Its totient is φ = 5076108256.

The previous prime is 12690270667. The next prime is 12690270683. The reversal of 12690270680 is 8607209621.

12690270680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×126902706802 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690270683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158628344 + ... + 158628423.

It is an arithmetic number, because the mean of its divisors is an integer number (1784569320).

Almost surely, 212690270680 is an apocalyptic number.

12690270680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12690270680 is an abundant number, since it is smaller than the sum of its proper divisors (15862838440).

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

12690270680 is a wasteful number, since it uses less digits than its factorization.

12690270680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317256778 (or 317256774 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 12690270680 in words is "twelve billion, six hundred ninety million, two hundred seventy thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 317256767 634513534 1269027068 1586283835 2538054136 3172567670 6345135340 12690270680