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79748640720 = 24345721913219
BaseRepresentation
bin100101001000101100…
…0111010111111010000
321121211211010200220000
41022101120322333100
52301311123000340
6100345214050000
75522150155500
oct1122130727720
9247754120800
1079748640720
1130904035141
12135577a9900
13769c037808
143c07627a00
15211b3bbd30
hex129163afd0

79748640720 has 600 divisors, whose sum is σ = 339183424800. Its totient is φ = 17267572224.

The previous prime is 79748640691. The next prime is 79748640793. The reversal of 79748640720 is 2704684797.

79748640720 is a `hidden beast` number, since 7 + 97 + 486 + 4 + 0 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6026271 + ... + 6039489.

It is an arithmetic number, because the mean of its divisors is an integer number (565305708).

Almost surely, 279748640720 is an apocalyptic number.

79748640720 is a gapful number since it is divisible by the number (70) 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 79748640720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169591712400).

79748640720 is an abundant number, since it is smaller than the sum of its proper divisors (259434784080).

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

79748640720 is a wasteful number, since it uses less digits than its factorization.

79748640720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277 (or 13255 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 79748640720 in words is "seventy-nine billion, seven hundred forty-eight million, six hundred forty thousand, seven hundred twenty".