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12881247160320 = 2113457111391451
BaseRepresentation
bin1011101101110010011000…
…1010010100100000000000
31200121102202021002020010000
42323130212022110200000
53142021243233112240
643221321355040000
72466432212204040
oct273344612244000
950542667066100
1012881247160320
1141169a7232690
12154057b740000
13725908c98246
143276545a7720
1517510de35430
hexbb726294800

12881247160320 has 1920 divisors, whose sum is σ = 58017152793600. Its totient is φ = 2655535104000.

The previous prime is 12881247160273. The next prime is 12881247160337. The reversal of 12881247160320 is 2306174218821.

12881247160320 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 12 + 4 + 7 + 1 + 603 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

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

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 159 ways as a sum of consecutive naturals, for example, 8877495595 + ... + 8877497045.

It is an arithmetic number, because the mean of its divisors is an integer number (30217267080).

Almost surely, 212881247160320 is an apocalyptic number.

12881247160320 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 12881247160320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29008576396800).

12881247160320 is an abundant number, since it is smaller than the sum of its proper divisors (45135905633280).

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

12881247160320 is a wasteful number, since it uses less digits than its factorization.

12881247160320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 12881247160320 in words is "twelve trillion, eight hundred eighty-one billion, two hundred forty-seven million, one hundred sixty thousand, three hundred twenty".