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68281218286 = 2239142847737
BaseRepresentation
bin111111100101111000…
…001011010011101110
320112020122011021121121
4333211320023103232
52104314442441121
651211251251154
74635033531151
oct774570132356
9215218137547
1068281218286
1126a59a70a16
12112972a9aba
136592323358
14343a641c98
151b9979c141
hexfe5e0b4ee

68281218286 has 8 divisors (see below), whose sum is σ = 102850371360. Its totient is φ = 33997761168.

The previous prime is 68281218281. The next prime is 68281218319.

68281218286 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68281218281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71423391 + ... + 71424346.

It is an arithmetic number, because the mean of its divisors is an integer number (12856296420).

Almost surely, 268281218286 is an apocalyptic number.

68281218286 is a deficient number, since it is larger than the sum of its proper divisors (34569153074).

68281218286 is a wasteful number, since it uses less digits than its factorization.

68281218286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142847978.

The product of its digits is 1179648, while the sum is 52.

The spelling of 68281218286 in words is "sixty-eight billion, two hundred eighty-one million, two hundred eighteen thousand, two hundred eighty-six".

Divisors: 1 2 239 478 142847737 285695474 34140609143 68281218286