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120131438587 = 1764310989977
BaseRepresentation
bin110111111100001100…
…1000100011111111011
3102111002011111101100021
41233320121010133323
53432012122013322
6131104305351311
711451653244166
oct1577031043773
9374064441307
10120131438587
1146a47079956
121b347938537
13b4364b7894
145b5899cadd
1531d17ba4c7
hex1bf86447fb

120131438587 has 8 divisors (see below), whose sum is σ = 127395824976. Its totient is φ = 112889033472.

The previous prime is 120131438561. The next prime is 120131438593. The reversal of 120131438587 is 785834131021.

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 120131438587 - 235 = 85771700219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120131438527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5484058 + ... + 5505919.

It is an arithmetic number, because the mean of its divisors is an integer number (15924478122).

Almost surely, 2120131438587 is an apocalyptic number.

120131438587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

120131438587 is a deficient number, since it is larger than the sum of its proper divisors (7264386389).

120131438587 is a wasteful number, since it uses less digits than its factorization.

120131438587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990637.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 120131438587 in words is "one hundred twenty billion, one hundred thirty-one million, four hundred thirty-eight thousand, five hundred eighty-seven".

Divisors: 1 17 643 10931 10989977 186829609 7066555211 120131438587