75278308673 has 2 divisors, whose sum is σ = 75278308674. Its totient is φ = 75278308672.

The previous prime is 75278308631. The next prime is 75278308741. The reversal of 75278308673 is 37680387257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74962606849 + 315701824 = 273793^2 + 17768^2 .

It is an emirp because it is prime and its reverse (37680387257) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75278308673 is a prime.

It is not a weakly prime, because it can be changed into another prime (75278301673) 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, 37639154336 + 37639154337.

It is an arithmetic number, because the mean of its divisors is an integer number (37639154337).

Almost surely, 2^75278308673 is an apocalyptic number.

It is an amenable number.

75278308673 is a deficient number, since it is larger than the sum of its proper divisors (1).

75278308673 is an equidigital number, since it uses as much as digits as its factorization.

75278308673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 75278308673 in words is "seventy-five billion, two hundred seventy-eight million, three hundred eight thousand, six hundred seventy-three".