75505351609 has 2 divisors, whose sum is σ = 75505351610. Its totient is φ = 75505351608.

The previous prime is 75505351601. The next prime is 75505351619. The reversal of 75505351609 is 90615350557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70147111609 + 5358240000 = 264853^2 + 73200^2 .

It is an emirp because it is prime and its reverse (90615350557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75505351609 - 2³ = 75505351601 is a prime.

It is not a weakly prime, because it can be changed into another prime (75505351601) 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, 37752675804 + 37752675805.

It is an arithmetic number, because the mean of its divisors is an integer number (37752675805).

Almost surely, 2^75505351609 is an apocalyptic number.

It is an amenable number.

75505351609 is a deficient number, since it is larger than the sum of its proper divisors (1).

75505351609 is an equidigital number, since it uses as much as digits as its factorization.

75505351609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708750, while the sum is 46.

The spelling of 75505351609 in words is "seventy-five billion, five hundred five million, three hundred fifty-one thousand, six hundred nine".