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87161142833 = 178361772603
BaseRepresentation
bin101000100101100110…
…1010111111000110001
322022222102001211012022
41101023031113320301
52412001223032313
6104012525441225
76203635330022
oct1211315277061
9268872054168
1087161142833
1133a68213746
1214a86110215
1382b093b73b
14430bc80c49
152402018c08
hex144b357e31

87161142833 has 8 divisors (see below), whose sum is σ = 93400177248. Its totient is φ = 81045653824.

The previous prime is 87161142829. The next prime is 87161142841. The reversal of 87161142833 is 33824116178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87161142833 - 22 = 87161142829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87161142883) 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 7 ways as a sum of consecutive naturals, for example, 30884891 + ... + 30887712.

It is an arithmetic number, because the mean of its divisors is an integer number (11675022156).

Almost surely, 287161142833 is an apocalyptic number.

87161142833 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

87161142833 is a deficient number, since it is larger than the sum of its proper divisors (6239034415).

87161142833 is a wasteful number, since it uses less digits than its factorization.

87161142833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61772703.

The product of its digits is 193536, while the sum is 44.

The spelling of 87161142833 in words is "eighty-seven billion, one hundred sixty-one million, one hundred forty-two thousand, eight hundred thirty-three".

Divisors: 1 17 83 1411 61772603 1050134251 5127126049 87161142833