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768274645 = 5153654929
BaseRepresentation
bin101101110010101…
…111000011010101
31222112122101200111
4231302233003111
53033134242040
6204122443021
725016140525
oct5562570325
91875571614
10768274645
11364742126
12195363471
13c32257a8
147406b685
15476abdea
hex2dcaf0d5

768274645 has 4 divisors (see below), whose sum is σ = 921929580. Its totient is φ = 614619712.

The previous prime is 768274613. The next prime is 768274667. The reversal of 768274645 is 546472867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546472867 = 3117628157.

It can be written as a sum of positive squares in 2 ways, for example, as 288796036 + 479478609 = 16994^2 + 21897^2 .

It is a cyclic number.

It is not a de Polignac number, because 768274645 - 25 = 768274613 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76827460 + ... + 76827469.

It is an arithmetic number, because the mean of its divisors is an integer number (230482395).

Almost surely, 2768274645 is an apocalyptic number.

It is an amenable number.

768274645 is a deficient number, since it is larger than the sum of its proper divisors (153654935).

768274645 is a wasteful number, since it uses less digits than its factorization.

768274645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153654934.

The product of its digits is 2257920, while the sum is 49.

The square root of 768274645 is about 27717.7676770695. The cubic root of 768274645 is about 915.8805442420.

The spelling of 768274645 in words is "seven hundred sixty-eight million, two hundred seventy-four thousand, six hundred forty-five".

Divisors: 1 5 153654929 768274645