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68720525287 is a prime number
BaseRepresentation
bin100000000000000001…
…1111111111111100111
320120101020210101112021
41000000003333333213
52111214423302122
651323023204011
74651646553451
oct1000003777747
9216336711467
1068720525287
1127164a43857
121139a446607
136632347c1b
14347cb192d1
151bc31271c7
hex10000fffe7

68720525287 has 2 divisors, whose sum is σ = 68720525288. Its totient is φ = 68720525286.

The previous prime is 68720525273. The next prime is 68720525347. The reversal of 68720525287 is 78252502786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68720525287 - 223 = 68712136679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68720555287) 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 as a sum of consecutive naturals, namely, 34360262643 + 34360262644.

It is an arithmetic number, because the mean of its divisors is an integer number (34360262644).

Almost surely, 268720525287 is an apocalyptic number.

68720525287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68720525287 is an equidigital number, since it uses as much as digits as its factorization.

68720525287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 68720525287 in words is "sixty-eight billion, seven hundred twenty million, five hundred twenty-five thousand, two hundred eighty-seven".