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16380254880 = 25325114324049
BaseRepresentation
bin11110100000101011…
…01101101010100000
31120021120100011102200
433100111231222200
5232021321124010
611305221413200
71116626604063
oct172025555240
946246304380
1016380254880
116a46254a30
12321186a200
1317107a3412
14b156768da
1565d0a8cc0
hex3d056daa0

16380254880 has 288 divisors, whose sum is σ = 62399937600. Its totient is φ = 3878461440.

The previous prime is 16380254833. The next prime is 16380254887. The reversal of 16380254880 is 8845208361.

16380254880 is a `hidden beast` number, since 1 + 638 + 0 + 2 + 5 + 4 + 8 + 8 + 0 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16380254887) 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, 669096 + ... + 693144.

It is an arithmetic number, because the mean of its divisors is an integer number (216666450).

Almost surely, 216380254880 is an apocalyptic number.

16380254880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16380254880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31199968800).

16380254880 is an abundant number, since it is smaller than the sum of its proper divisors (46019682720).

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

16380254880 is a wasteful number, since it uses less digits than its factorization.

16380254880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24124 (or 24113 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 16380254880 in words is "sixteen billion, three hundred eighty million, two hundred fifty-four thousand, eight hundred eighty".