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12813357279 = 343127782113
BaseRepresentation
bin10111110111011110…
…00101000011011111
31020001222120222210010
423323233011003133
5202220204413104
65515242414303
7632345511522
oct137357050337
936058528703
1012813357279
115485895a78
122597201393
131292813418
14897a62bb9
154eed85489
hex2fbbc50df

12813357279 has 16 divisors (see below), whose sum is σ = 17619464192. Its totient is φ = 8277873408.

The previous prime is 12813357259. The next prime is 12813357287. The reversal of 12813357279 is 97275331821.

It is not a de Polignac number, because 12813357279 - 211 = 12813355231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813357229) 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, 374674 + ... + 407439.

It is an arithmetic number, because the mean of its divisors is an integer number (1101216512).

Almost surely, 212813357279 is an apocalyptic number.

12813357279 is a deficient number, since it is larger than the sum of its proper divisors (4806106913).

12813357279 is a wasteful number, since it uses less digits than its factorization.

12813357279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782286.

The product of its digits is 635040, while the sum is 48.

The spelling of 12813357279 in words is "twelve billion, eight hundred thirteen million, three hundred fifty-seven thousand, two hundred seventy-nine".

Divisors: 1 3 43 127 129 381 5461 16383 782113 2346339 33630859 99328351 100892577 297985053 4271119093 12813357279