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7121385712 = 24764699829
BaseRepresentation
bin1101010000111011…
…11011100011110000
3200101022010212200101
412220131323203300
5104041033320322
63134352002144
7341321531320
oct65035734360
920338125611
107121385712
113024922541
121468b30354
138964c67cc
144b7b17280
152ba2e5327
hex1a877b8f0

7121385712 has 40 divisors (see below), whose sum is σ = 15772824800. Its totient is φ = 3051240192.

The previous prime is 7121385707. The next prime is 7121385737. The reversal of 7121385712 is 2175831217.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719614 + ... + 729442.

It is an arithmetic number, because the mean of its divisors is an integer number (394320620).

Almost surely, 27121385712 is an apocalyptic number.

It is an amenable number.

7121385712 is an abundant number, since it is smaller than the sum of its proper divisors (8651439088).

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

7121385712 is a wasteful number, since it uses less digits than its factorization.

7121385712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16313 (or 16307 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 7121385712 is about 84388.3031705224. The cubic root of 7121385712 is about 1923.9251400458.

The spelling of 7121385712 in words is "seven billion, one hundred twenty-one million, three hundred eighty-five thousand, seven hundred twelve".

Divisors: 1 2 4 7 8 14 16 28 56 112 6469 9829 12938 19658 25876 39316 45283 51752 68803 78632 90566 103504 137606 157264 181132 275212 362264 550424 724528 1100848 63583801 127167602 254335204 445086607 508670408 890173214 1017340816 1780346428 3560692856 7121385712