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205668648856 = 231110123140037
BaseRepresentation
bin1011111110001011001…
…1101000011110011000
3201122212101211212212001
42333202303220132120
511332202133230411
6234252144530344
720600442446026
oct2774263503630
9648771755761
10205668648856
117a250654a70
1233a3a0209b4
1316518861178
149d50cb9716
15553ae58dc1
hex2fe2ce8798

205668648856 has 32 divisors (see below), whose sum is σ = 424851097680. Its totient is φ = 92560144000.

The previous prime is 205668648827. The next prime is 205668648893. The reversal of 205668648856 is 658846866502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11561131 + ... + 11578906.

Almost surely, 2205668648856 is an apocalyptic number.

It is an amenable number.

205668648856 is an abundant number, since it is smaller than the sum of its proper divisors (219182448824).

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

205668648856 is a wasteful number, since it uses less digits than its factorization.

205668648856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23140155 (or 23140151 counting only the distinct ones).

The product of its (nonzero) digits is 132710400, while the sum is 64.

The spelling of 205668648856 in words is "two hundred five billion, six hundred sixty-eight million, six hundred forty-eight thousand, eight hundred fifty-six".

Divisors: 1 2 4 8 11 22 44 88 101 202 404 808 1111 2222 4444 8888 23140037 46280074 92560148 185120296 254540407 509080814 1018161628 2036323256 2337143737 4674287474 9348574948 18697149896 25708581107 51417162214 102834324428 205668648856