73405855709 has 2 divisors, whose sum is σ = 73405855710. Its totient is φ = 73405855708.

The previous prime is 73405855693. The next prime is 73405855717. The reversal of 73405855709 is 90755850437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73089122500 + 316733209 = 270350^2 + 17797^2 .

It is a cyclic number.

It is not a de Polignac number, because 73405855709 - 2⁴ = 73405855693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73405855409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36702927854 + 36702927855.

It is an arithmetic number, because the mean of its divisors is an integer number (36702927855).

Almost surely, 2^73405855709 is an apocalyptic number.

It is an amenable number.

73405855709 is a deficient number, since it is larger than the sum of its proper divisors (1).

73405855709 is an equidigital number, since it uses as much as digits as its factorization.

73405855709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 73405855709 in words is "seventy-three billion, four hundred five million, eight hundred fifty-five thousand, seven hundred nine".