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68655 = 3523199
BaseRepresentation
bin10000110000101111
310111011210
4100300233
54144110
61245503
7404106
oct206057
9114153
1068655
1147644
1233893
1325332
141b03d
1515520
hex10c2f

68655 has 16 divisors (see below), whose sum is σ = 115200. Its totient is φ = 34848.

The previous prime is 68639. The next prime is 68659. The reversal of 68655 is 55686.

68655 = T30 + T31 + ... + T75.

It is not a de Polignac number, because 68655 - 24 = 68639 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 68655.

It is not an unprimeable number, because it can be changed into a prime (68659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246 + ... + 444.

It is an arithmetic number, because the mean of its divisors is an integer number (7200).

268655 is an apocalyptic number.

68655 is a deficient number, since it is larger than the sum of its proper divisors (46545).

68655 is a wasteful number, since it uses less digits than its factorization.

68655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its digits is 7200, while the sum is 30.

The square root of 68655 is about 262.0209915255. The cubic root of 68655 is about 40.9471856149.

Adding to 68655 its product of digits (7200), we get a triangular number (75855 = T389).

It can be divided in two parts, 686 and 55, that added together give a triangular number (741 = T38).

The spelling of 68655 in words is "sixty-eight thousand, six hundred fifty-five".

Divisors: 1 3 5 15 23 69 115 199 345 597 995 2985 4577 13731 22885 68655