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18475890652449 = 333187510742043
BaseRepresentation
bin1000011001101110000001…
…11001100011010100100001
32102102021111120211121121000
410030313000321203110201
54410202111001334244
6103143412413222213
73614560536226206
oct414670071432441
972367446747530
1018475890652449
11598364367602a
1220a4902491969
13a40366036a09
1447c348a4dcad
152209010eb169
hex10cdc0e63521

18475890652449 has 32 divisors (see below), whose sum is σ = 27386291095040. Its totient is φ = 12310691689296.

The previous prime is 18475890652433. The next prime is 18475890652469. The reversal of 18475890652449 is 94425609857481.

It is a happy number.

18475890652449 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 5 + 8 + 90 + 6 + 524 + 4 + 9 = 666.

It is not a de Polignac number, because 18475890652449 - 24 = 18475890652433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18475890652469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439431222 + ... + 439473264.

It is an arithmetic number, because the mean of its divisors is an integer number (855821596720).

Almost surely, 218475890652449 is an apocalyptic number.

It is an amenable number.

18475890652449 is a deficient number, since it is larger than the sum of its proper divisors (8910400442591).

18475890652449 is a wasteful number, since it uses less digits than its factorization.

18475890652449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50346 (or 50340 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 72.

The spelling of 18475890652449 in words is "eighteen trillion, four hundred seventy-five billion, eight hundred ninety million, six hundred fifty-two thousand, four hundred forty-nine".

Divisors: 1 3 9 27 3187 5107 9561 15321 28683 42043 45963 86049 126129 137889 378387 1135161 16276009 48828027 133991041 146484081 214713601 401973123 439452243 644140803 1205919369 1932422409 3617758107 5797267227 684292246387 2052876739161 6158630217483 18475890652449