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68609245833 = 332541083179
BaseRepresentation
bin111111111001011011…
…100000001010001001
320120002111101210211000
4333321123200022021
52111002431331313
651304010125213
74646125652532
oct777133401211
9216074353730
1068609245833
1127108148967
1211369120809
1366152853ab
14346c02d689
151bb8495673
hexff96e0289

68609245833 has 8 divisors (see below), whose sum is σ = 101643327200. Its totient is φ = 45739497204.

The previous prime is 68609245819. The next prime is 68609245843. The reversal of 68609245833 is 33854290686.

68609245833 is a `hidden beast` number, since 6 + 8 + 609 + 24 + 5 + 8 + 3 + 3 = 666.

It is not a de Polignac number, because 68609245833 - 218 = 68608983689 is a prime.

It is a super-2 number, since 2×686092458332 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68609245833.

It is not an unprimeable number, because it can be changed into a prime (68609245843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270541563 + ... + 1270541616.

It is an arithmetic number, because the mean of its divisors is an integer number (12705415900).

Almost surely, 268609245833 is an apocalyptic number.

It is an amenable number.

68609245833 is a deficient number, since it is larger than the sum of its proper divisors (33034081367).

68609245833 is a wasteful number, since it uses less digits than its factorization.

68609245833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541083188 (or 2541083182 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 68609245833 in words is "sixty-eight billion, six hundred nine million, two hundred forty-five thousand, eight hundred thirty-three".

Divisors: 1 3 9 27 2541083179 7623249537 22869748611 68609245833