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8068452281 = 78710252163
BaseRepresentation
bin1111000001110101…
…01100111110111001
3202211022012211202222
413200322230332321
5113011010433111
63412342533425
7403641466331
oct74072547671
922738184688
108068452281
11347048168a
121692137275
139b778c326
145678060c1
1532351c7db
hex1e0eacfb9

8068452281 has 4 divisors (see below), whose sum is σ = 8078705232. Its totient is φ = 8058199332.

The previous prime is 8068452269. The next prime is 8068452299. The reversal of 8068452281 is 1822548608.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8068452281 - 210 = 8068451257 is a prime.

It is a super-2 number, since 2×80684522812 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8068452221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125295 + ... + 5126868.

It is an arithmetic number, because the mean of its divisors is an integer number (2019676308).

Almost surely, 28068452281 is an apocalyptic number.

It is an amenable number.

8068452281 is a deficient number, since it is larger than the sum of its proper divisors (10252951).

8068452281 is a wasteful number, since it uses less digits than its factorization.

8068452281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252950.

The product of its (nonzero) digits is 245760, while the sum is 44.

The square root of 8068452281 is about 89824.5639065395. The cubic root of 8068452281 is about 2005.6881638094.

The spelling of 8068452281 in words is "eight billion, sixty-eight million, four hundred fifty-two thousand, two hundred eighty-one".

Divisors: 1 787 10252163 8068452281