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12512957471 = 721913440341
BaseRepresentation
bin10111010011101010…
…01001010000011111
31012022001100002201022
423221311021100133
5201111304114341
65425352034355
7622040245400
oct135165112037
935261302638
1012512957471
115341269173
1225126929bb
131245505661
14869bc79a7
154d37e7e4b
hex2e9d4941f

12512957471 has 12 divisors (see below), whose sum is σ = 15321989880. Its totient is φ = 10160897040.

The previous prime is 12512957447. The next prime is 12512957477. The reversal of 12512957471 is 17475921521.

It is not a de Polignac number, because 12512957471 - 214 = 12512941087 is a prime.

It is a super-3 number, since 3×125129574713 (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512957477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6719240 + ... + 6721101.

It is an arithmetic number, because the mean of its divisors is an integer number (1276832490).

Almost surely, 212512957471 is an apocalyptic number.

12512957471 is a deficient number, since it is larger than the sum of its proper divisors (2809032409).

12512957471 is a wasteful number, since it uses less digits than its factorization.

12512957471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440374 (or 13440367 counting only the distinct ones).

The product of its digits is 176400, while the sum is 44.

The spelling of 12512957471 in words is "twelve billion, five hundred twelve million, nine hundred fifty-seven thousand, four hundred seventy-one".

Divisors: 1 7 19 49 133 931 13440341 94082387 255366479 658576709 1787565353 12512957471