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64323748512 = 2535191632671
BaseRepresentation
bin111011111001111111…
…101000001010100000
320011000211110222200000
4323321333220022200
52023213334423022
645314441100000
74435000561332
oct737177501240
9204024428600
1064323748512
1125309096341
1210571a87600
1360b147306a
143182bdd452
151a171286ac
hexef9fe82a0

64323748512 has 288 divisors, whose sum is σ = 200979717120. Its totient is φ = 20180586240.

The previous prime is 64323748481. The next prime is 64323748513. The reversal of 64323748512 is 21584732346.

64323748512 is a `hidden beast` number, since 6 + 43 + 23 + 74 + 8 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is not an unprimeable number, because it can be changed into a prime (64323748513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24080937 + ... + 24083607.

It is an arithmetic number, because the mean of its divisors is an integer number (697846240).

Almost surely, 264323748512 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 64323748512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100489858560).

64323748512 is an abundant number, since it is smaller than the sum of its proper divisors (136655968608).

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

64323748512 is a wasteful number, since it uses less digits than its factorization.

64323748512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2858 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 64323748512 in words is "sixty-four billion, three hundred twenty-three million, seven hundred forty-eight thousand, five hundred twelve".