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78947728383 = 326315909461
BaseRepresentation
bin100100110000110100…
…1101011101111111111
321112210000002010201010
41021201221223233333
52243141104302013
6100133523450303
75463253422216
oct1114151535777
9245700063633
1078947728383
1130532a30917
1213373526993
1375a21255a4
143b6d10207d
1520c0e147c3
hex1261a6bbff

78947728383 has 4 divisors (see below), whose sum is σ = 105263637848. Its totient is φ = 52631818920.

The previous prime is 78947728339. The next prime is 78947728397. The reversal of 78947728383 is 38382774987.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78947728383 - 212 = 78947724287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947728313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13157954728 + ... + 13157954733.

It is an arithmetic number, because the mean of its divisors is an integer number (26315909462).

Almost surely, 278947728383 is an apocalyptic number.

78947728383 is a deficient number, since it is larger than the sum of its proper divisors (26315909465).

78947728383 is a wasteful number, since it uses less digits than its factorization.

78947728383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26315909464.

The product of its digits is 113799168, while the sum is 66.

The spelling of 78947728383 in words is "seventy-eight billion, nine hundred forty-seven million, seven hundred twenty-eight thousand, three hundred eighty-three".

Divisors: 1 3 26315909461 78947728383