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80208993984 = 2637157463821
BaseRepresentation
bin100101010110011010…
…1000001111011000000
321200000220101001211220
41022230311001323000
52303232000301414
6100503021035040
75536440125340
oct1125465017300
9250026331756
1080208993984
113101a982389
12136659b5a80
13774351aab2
143c4c81cd20
152146a02ca9
hex12acd41ec0

80208993984 has 224 divisors, whose sum is σ = 244906653696. Its totient is φ = 22694031360.

The previous prime is 80208993983. The next prime is 80208994003. The reversal of 80208993984 is 48939980208.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (80208993983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97696294 + ... + 97697114.

Almost surely, 280208993984 is an apocalyptic number.

80208993984 is a gapful number since it is divisible by the number (84) 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 80208993984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122453326848).

80208993984 is an abundant number, since it is smaller than the sum of its proper divisors (164697659712).

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

80208993984 is a wasteful number, since it uses less digits than its factorization.

80208993984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 60.

The spelling of 80208993984 in words is "eighty billion, two hundred eight million, nine hundred ninety-three thousand, nine hundred eighty-four".