73158235613 has 2 divisors, whose sum is σ = 73158235614. Its totient is φ = 73158235612.

The previous prime is 73158235571. The next prime is 73158235669. The reversal of 73158235613 is 31653285137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55633241689 + 17524993924 = 235867^2 + 132382^2 .

It is a cyclic number.

It is not a de Polignac number, because 73158235613 - 2⁸ = 73158235357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73158237613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36579117806 + 36579117807.

It is an arithmetic number, because the mean of its divisors is an integer number (36579117807).

Almost surely, 2^73158235613 is an apocalyptic number.

It is an amenable number.

73158235613 is a deficient number, since it is larger than the sum of its proper divisors (1).

73158235613 is an equidigital number, since it uses as much as digits as its factorization.

73158235613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The spelling of 73158235613 in words is "seventy-three billion, one hundred fifty-eight million, two hundred thirty-five thousand, six hundred thirteen".