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16557947353 = 53312414101
BaseRepresentation
bin11110110101110111…
…00011100111011001
31120201221200212200101
433122323203213121
5232402313303403
611335010135401
71124215141663
oct173273434731
946657625611
1016557947353
117027590a12
123261281561
13173b549bac
14b310cd533
1566d9a871d
hex3daee39d9

16557947353 has 4 divisors (see below), whose sum is σ = 16870361508. Its totient is φ = 16245533200.

The previous prime is 16557947327. The next prime is 16557947359. The reversal of 16557947353 is 35374975561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13159990089 + 3397957264 = 114717^2 + 58292^2 .

It is a cyclic number.

It is not a de Polignac number, because 16557947353 - 213 = 16557939161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16557947294 and 16557947303.

It is not an unprimeable number, because it can be changed into a prime (16557947359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156206998 + ... + 156207103.

It is an arithmetic number, because the mean of its divisors is an integer number (4217590377).

Almost surely, 216557947353 is an apocalyptic number.

It is an amenable number.

16557947353 is a deficient number, since it is larger than the sum of its proper divisors (312414155).

16557947353 is an equidigital number, since it uses as much as digits as its factorization.

16557947353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312414154.

The product of its digits is 11907000, while the sum is 55.

The spelling of 16557947353 in words is "sixteen billion, five hundred fifty-seven million, nine hundred forty-seven thousand, three hundred fifty-three".

Divisors: 1 53 312414101 16557947353