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128088930871 = 1165123178807
BaseRepresentation
bin111011101001010110…
…0011111101000110111
3110020121201220212121201
41313102230133220313
54044311231241441
6134502050153331
712153106643146
oct1672254375067
9406551825551
10128088930871
114a35a953660
12209a8882847
13c103c968b5
1462b175d75d
1534ea1bac31
hex1dd2b1fa37

128088930871 has 8 divisors (see below), whose sum is σ = 139736306304. Its totient is φ = 116442043320.

The previous prime is 128088930839. The next prime is 128088930877. The reversal of 128088930871 is 178039880821.

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 128088930871 - 25 = 128088930839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128088930877) 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, 626950 + ... + 805756.

It is an arithmetic number, because the mean of its divisors is an integer number (17467038288).

Almost surely, 2128088930871 is an apocalyptic number.

128088930871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128088930871 is a deficient number, since it is larger than the sum of its proper divisors (11647375433).

128088930871 is a wasteful number, since it uses less digits than its factorization.

128088930871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243941.

The product of its (nonzero) digits is 1548288, while the sum is 55.

The spelling of 128088930871 in words is "one hundred twenty-eight billion, eighty-eight million, nine hundred thirty thousand, eight hundred seventy-one".

Divisors: 1 11 65123 178807 716353 1966877 11644448261 128088930871