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12885521853 = 319319222329
BaseRepresentation
bin11000000000000100…
…10111010110111101
31020021000101022222010
430000002113112331
5202342143144403
65530341241433
7634213062051
oct140002272675
936230338863
1012885521853
1155125a5316
1225b7403279
1312a475c259
148a3489c61
1550638c603
hex3000975bd

12885521853 has 8 divisors (see below), whose sum is σ = 17181662400. Its totient is φ = 8589864608.

The previous prime is 12885521849. The next prime is 12885521917. The reversal of 12885521853 is 35812558821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12885521853 - 22 = 12885521849 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12885521813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53208 + ... + 169121.

It is an arithmetic number, because the mean of its divisors is an integer number (2147707800).

Almost surely, 212885521853 is an apocalyptic number.

It is an amenable number.

12885521853 is a deficient number, since it is larger than the sum of its proper divisors (4296140547).

12885521853 is a wasteful number, since it uses less digits than its factorization.

12885521853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241651.

The product of its digits is 768000, while the sum is 48.

The spelling of 12885521853 in words is "twelve billion, eight hundred eighty-five million, five hundred twenty-one thousand, eight hundred fifty-three".

Divisors: 1 3 19319 57957 222329 666987 4295173951 12885521853