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80513256371 = 192223028411
BaseRepresentation
bin100101011111011110…
…1101100101110110011
321200211002220012101012
41022332331230232303
52304342343200441
6100553130301135
75550123246602
oct1127675545663
9250732805335
1080513256371
11311666a81a9
121372b8877ab
13779157ba02
143c7adc1a39
1521635a49eb
hex12bef6cbb3

80513256371 has 6 divisors (see below), whose sum is σ = 84973824972. Its totient is φ = 76275716220.

The previous prime is 80513256361. The next prime is 80513256379. The reversal of 80513256371 is 17365231508.

It is not a de Polignac number, because 80513256371 - 214 = 80513239987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80513256379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111513845 + ... + 111514566.

It is an arithmetic number, because the mean of its divisors is an integer number (14162304162).

Almost surely, 280513256371 is an apocalyptic number.

80513256371 is a deficient number, since it is larger than the sum of its proper divisors (4460568601).

80513256371 is a wasteful number, since it uses less digits than its factorization.

80513256371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223028449 (or 223028430 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

Adding to 80513256371 its reverse (17365231508), we get a palindrome (97878487879).

The spelling of 80513256371 in words is "eighty billion, five hundred thirteen million, two hundred fifty-six thousand, three hundred seventy-one".

Divisors: 1 19 361 223028411 4237539809 80513256371