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12744468831 = 37189672283
BaseRepresentation
bin10111101111010000…
…10010100101011111
31012220011222002121010
423313220102211133
5202100041000311
65504342110303
7630551124543
oct136750224537
935804862533
1012744468831
11544aa14076
12257811b393
131281473823
1488c84da23
154e8cc8da6
hex2f7a1295f

12744468831 has 16 divisors (see below), whose sum is σ = 17425601280. Its totient is φ = 8282514240.

The previous prime is 12744468757. The next prime is 12744468833. The reversal of 12744468831 is 13886444721.

It is not a de Polignac number, because 12744468831 - 214 = 12744452447 is a prime.

It is a super-2 number, since 2×127444688312 (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 (12744468833) 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, 317185 + ... + 355098.

It is an arithmetic number, because the mean of its divisors is an integer number (1089100080).

Almost surely, 212744468831 is an apocalyptic number.

12744468831 is a deficient number, since it is larger than the sum of its proper divisors (4681132449).

12744468831 is an equidigital number, since it uses as much as digits as its factorization.

12744468831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672446.

The product of its digits is 1032192, while the sum is 48.

The spelling of 12744468831 in words is "twelve billion, seven hundred forty-four million, four hundred sixty-eight thousand, eight hundred thirty-one".

Divisors: 1 3 71 89 213 267 6319 18957 672283 2016849 47732093 59833187 143196279 179499561 4248156277 12744468831