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6780409071384 = 23313219233825397
BaseRepresentation
bin110001010101010111111…
…0111111100011100011000
3220000012102100220000002010
41202222233313330130120
51342042234210241014
622230513225505520
71266603600112224
oct142525767743430
926005370800063
106780409071384
112184612179553
129161093422a0
133a250b5cb100
14196260315784
15bb5923b5359
hex62aafdfc718

6780409071384 has 192 divisors, whose sum is σ = 20161377619200. Its totient is φ = 1890541306368.

The previous prime is 6780409071377. The next prime is 6780409071389. The reversal of 6780409071384 is 4831709040876.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780409071389) 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, 140227 + ... + 3685170.

It is an arithmetic number, because the mean of its divisors is an integer number (105007175100).

Almost surely, 26780409071384 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 6780409071384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10080688809600).

6780409071384 is an abundant number, since it is smaller than the sum of its proper divisors (13380968547816).

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

6780409071384 is a wasteful number, since it uses less digits than its factorization.

6780409071384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825474 (or 3825457 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 6780409071384 in words is "six trillion, seven hundred eighty billion, four hundred nine million, seventy-one thousand, three hundred eighty-four".