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87947068954 = 21123233916741
BaseRepresentation
bin101000111101000001…
…1011100011000011010
322102000011221000011011
41101322003130120122
52420103422201304
6104222522524134
76232260515563
oct1217203343032
9272004830134
1087947068954
1134330911668
121506536664a
1383a7704694
1443843c516a
15244b010c04
hex147a0dc61a

87947068954 has 16 divisors (see below), whose sum is σ = 132102416160. Its totient is φ = 43912970640.

The previous prime is 87947068903. The next prime is 87947068967. The reversal of 87947068954 is 45986074978.

It is a self number, because there is not a number n which added to its sum of digits gives 87947068954.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5245024 + ... + 5261764.

It is an arithmetic number, because the mean of its divisors is an integer number (8256401010).

Almost surely, 287947068954 is an apocalyptic number.

87947068954 is a deficient number, since it is larger than the sum of its proper divisors (44155347206).

87947068954 is a wasteful number, since it uses less digits than its factorization.

87947068954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20205.

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 87947068954 in words is "eighty-seven billion, nine hundred forty-seven million, sixty-eight thousand, nine hundred fifty-four".

Divisors: 1 2 1123 2246 2339 4678 16741 33482 2626697 5253394 18800143 37600286 39157199 78314398 43973534477 87947068954