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87983393255 = 517596678651
BaseRepresentation
bin101000111110000111…
…0000000100111100111
322102002201021110201122
41101330032000213213
52420142222041010
6104230301244155
76233211334412
oct1217416004747
9272081243648
1087983393255
113434a37164a
121507556365b
1383b20b2154
14438915cb79
15244e2d8855
hex147c3809e7

87983393255 has 4 divisors (see below), whose sum is σ = 105580071912. Its totient is φ = 70386714600.

The previous prime is 87983393207. The next prime is 87983393273. The reversal of 87983393255 is 55239338978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55239338978 = 227619669489.

It is not a de Polignac number, because 87983393255 - 224 = 87966616039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8798339321 + ... + 8798339330.

It is an arithmetic number, because the mean of its divisors is an integer number (26395017978).

Almost surely, 287983393255 is an apocalyptic number.

87983393255 is a deficient number, since it is larger than the sum of its proper divisors (17596678657).

87983393255 is a wasteful number, since it uses less digits than its factorization.

87983393255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17596678656.

The product of its digits is 48988800, while the sum is 62.

The spelling of 87983393255 in words is "eighty-seven billion, nine hundred eighty-three million, three hundred ninety-three thousand, two hundred fifty-five".

Divisors: 1 5 17596678651 87983393255