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64123941384 = 23331767713671
BaseRepresentation
bin111011101110000101…
…011011001000001000
320010111220111201211000
4323232011123020020
52022311212111014
645242542335000
74430023336266
oct735605331010
9203456451730
1064123941384
1125216325288
1210516b8a460
13607bc557a9
14316446b436
151a0480b509
hexeee15b208

64123941384 has 256 divisors, whose sum is σ = 194163609600. Its totient is φ = 19532620800.

The previous prime is 64123941361. The next prime is 64123941403. The reversal of 64123941384 is 48314932146.

64123941384 is a `hidden beast` number, since 64 + 123 + 94 + 1 + 384 = 666.

It is a super-3 number, since 3×641239413843 (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

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 63 ways as a sum of consecutive naturals, for example, 17465869 + ... + 17469539.

It is an arithmetic number, because the mean of its divisors is an integer number (758451600).

Almost surely, 264123941384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64123941384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97081804800).

64123941384 is an abundant number, since it is smaller than the sum of its proper divisors (130039668216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64123941384 is a wasteful number, since it uses less digits than its factorization.

64123941384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841 (or 3831 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 64123941384 in words is "sixty-four billion, one hundred twenty-three million, nine hundred forty-one thousand, three hundred eighty-four".