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87485458479 = 3592233376577
BaseRepresentation
bin101000101111010001…
…0100010100000101111
322100211000022202121220
41101132202202200233
52413132234132404
6104105032554423
76214654061466
oct1213642424057
9270730282556
1087485458479
1134114295901
1214b56852a13
138332ba10a3
14433cd839dd
15242072c4d9
hex145e8a282f

87485458479 has 32 divisors (see below), whose sum is σ = 119528048640. Its totient is φ = 56899971072.

The previous prime is 87485458469. The next prime is 87485458481. The reversal of 87485458479 is 97485458478.

It is a happy number.

It is not a de Polignac number, because 87485458479 - 27 = 87485458351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87485458469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13298439 + ... + 13305015.

It is an arithmetic number, because the mean of its divisors is an integer number (3735251520).

Almost surely, 287485458479 is an apocalyptic number.

87485458479 is a deficient number, since it is larger than the sum of its proper divisors (32042590161).

87485458479 is a wasteful number, since it uses less digits than its factorization.

87485458479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7199.

The product of its digits is 361267200, while the sum is 69.

Subtracting 87485458479 from its reverse (97485458478), we obtain a palindrome (9999999999).

The spelling of 87485458479 in words is "eighty-seven billion, four hundred eighty-five million, four hundred fifty-eight thousand, four hundred seventy-nine".

Divisors: 1 3 59 177 223 337 669 1011 6577 13157 19731 19883 39471 59649 75151 225453 388043 1164129 1466671 2216449 4400013 4433909 6649347 13301727 86533589 130770491 259600767 392311473 494268127 1482804381 29161819493 87485458479