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68137161 = 3131281617
BaseRepresentation
bin1000000111110…
…11000011001001
311202012201121120
410003323003021
5114420342121
610432225453
71455104421
oct403730311
9152181546
1068137161
1135509504
121a99b289
1311168961
149099481
155eadbc6
hex40fb0c9

68137161 has 16 divisors (see below), whose sum is σ = 92017728. Its totient is φ = 44844800.

The previous prime is 68137141. The next prime is 68137177. The reversal of 68137161 is 16173186.

It is a cyclic number.

It is not a de Polignac number, because 68137161 - 25 = 68137129 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68137141) 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, 110125 + ... + 110741.

It is an arithmetic number, because the mean of its divisors is an integer number (5751108).

Almost surely, 268137161 is an apocalyptic number.

It is an amenable number.

68137161 is a deficient number, since it is larger than the sum of its proper divisors (23880567).

68137161 is a wasteful number, since it uses less digits than its factorization.

68137161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its digits is 6048, while the sum is 33.

The square root of 68137161 is about 8254.5236688739. The cubic root of 68137161 is about 408.4397591629.

The spelling of 68137161 in words is "sixty-eight million, one hundred thirty-seven thousand, one hundred sixty-one".

Divisors: 1 3 131 281 393 617 843 1851 36811 80827 110433 173377 242481 520131 22712387 68137161