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78430665480121 is a prime number
BaseRepresentation
bin10001110101010100001111…
…111101001001011110111001
3101021200220020221002100010201
4101311110033331021132321
540240002000330330441
6434450314511242201
722343300001601363
oct2165241775113671
9337626227070121
1078430665480121
1122a99292a86859
12896847b219361
13349bc981452b6
1415520c8c61d33
159102655d2c31
hex47550ff497b9

78430665480121 has 2 divisors, whose sum is σ = 78430665480122. Its totient is φ = 78430665480120.

The previous prime is 78430665480107. The next prime is 78430665480149. The reversal of 78430665480121 is 12108456603487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61657217588521 + 16773447891600 = 7852211^2 + 4095540^2 .

It is an emirp because it is prime and its reverse (12108456603487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78430665480121 - 29 = 78430665479609 is a prime.

It is not a weakly prime, because it can be changed into another prime (78430665480521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39215332740060 + 39215332740061.

It is an arithmetic number, because the mean of its divisors is an integer number (39215332740061).

Almost surely, 278430665480121 is an apocalyptic number.

It is an amenable number.

78430665480121 is a deficient number, since it is larger than the sum of its proper divisors (1).

78430665480121 is an equidigital number, since it uses as much as digits as its factorization.

78430665480121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 78430665480121 in words is "seventy-eight trillion, four hundred thirty billion, six hundred sixty-five million, four hundred eighty thousand, one hundred twenty-one".