73159509613 has 2 divisors, whose sum is σ = 73159509614. Its totient is φ = 73159509612.

The previous prime is 73159509607. The next prime is 73159509623. The reversal of 73159509613 is 31690595137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61773125764 + 11386383849 = 248542^2 + 106707^2 .

It is a cyclic number.

It is not a de Polignac number, because 73159509613 - 2¹³ = 73159501421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73159509623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36579754806 + 36579754807.

It is an arithmetic number, because the mean of its divisors is an integer number (36579754807).

Almost surely, 2^73159509613 is an apocalyptic number.

It is an amenable number.

73159509613 is a deficient number, since it is larger than the sum of its proper divisors (1).

73159509613 is an equidigital number, since it uses as much as digits as its factorization.

73159509613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765450, while the sum is 49.

The spelling of 73159509613 in words is "seventy-three billion, one hundred fifty-nine million, five hundred nine thousand, six hundred thirteen".