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68207605258 = 213171631675669
BaseRepresentation
bin111111100001011111…
…010111011000001010
320112001111122100112011
4333201133113120022
52104142121332013
651200101410134
74633151036002
oct774137273012
9215044570464
1068207605258
1126a21462401
121127670994a
13657ccbb150
14343095d002
151b930aac3d
hexfe17d760a

68207605258 has 64 divisors (see below), whose sum is σ = 118102199040. Its totient is φ = 29265380352.

The previous prime is 68207605247. The next prime is 68207605273. The reversal of 68207605258 is 85250670286.

It is a super-2 number, since 2×682076052582 (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12028848 + ... + 12034516.

It is an arithmetic number, because the mean of its divisors is an integer number (1845346860).

Almost surely, 268207605258 is an apocalyptic number.

68207605258 is a deficient number, since it is larger than the sum of its proper divisors (49894593782).

68207605258 is a wasteful number, since it uses less digits than its factorization.

68207605258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6031.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 68207605258 in words is "sixty-eight billion, two hundred seven million, six hundred five thousand, two hundred fifty-eight".

Divisors: 1 2 13 17 26 34 163 167 221 326 334 442 2119 2171 2771 2839 4238 4342 5542 5669 5678 11338 27221 36023 36907 54442 72046 73697 73814 96373 147394 192746 353873 462757 707746 924047 925514 946723 1252849 1848094 1893446 2505698 6015841 12012611 12031682 12307399 15708799 16094291 24025222 24614798 31417598 32188582 154315849 204214387 209225783 308631698 408428774 418451566 2006106037 2623369433 4012212074 5246738866 34103802629 68207605258