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68686292120 = 2354993441197
BaseRepresentation
bin111111111110000001…
…011010010010011000
320120021212101011110012
4333332001122102120
52111132142321440
651315401341052
74651052564345
oct777601322230
9216255334405
1068686292120
1127147691986
121138aa97788
136628220204
1434783677cc
151bc0113e65
hexffe05a498

68686292120 has 32 divisors (see below), whose sum is σ = 154853910000. Its totient is φ = 27419449728.

The previous prime is 68686292117. The next prime is 68686292123. The reversal of 68686292120 is 2129268686.

It is an interprime number because it is at equal distance from previous prime (68686292117) and next prime (68686292123).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68686292123) 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, 1700639 + ... + 1740558.

Almost surely, 268686292120 is an apocalyptic number.

It is an amenable number.

68686292120 is an abundant number, since it is smaller than the sum of its proper divisors (86167617880).

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

68686292120 is a wasteful number, since it uses less digits than its factorization.

68686292120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441707 (or 3441703 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 68686292120 in words is "sixty-eight billion, six hundred eighty-six million, two hundred ninety-two thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 499 998 1996 2495 3992 4990 9980 19960 3441197 6882394 13764788 17205985 27529576 34411970 68823940 137647880 1717157303 3434314606 6868629212 8585786515 13737258424 17171573030 34343146060 68686292120