68363365409 has 4 divisors (see below), whose sum is σ = 68365918740. Its totient is φ = 68360812080.

The previous prime is 68363365363. The next prime is 68363365423. The reversal of 68363365409 is 90456336386.

68363365409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17648325409 + 50715040000 = 132847^2 + 225200^2 .

It is a cyclic number.

It is not a de Polignac number, because 68363365409 - 2²⁰ = 68362316833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68363365439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236074 + ... + 1290195.

It is an arithmetic number, because the mean of its divisors is an integer number (17091479685).

Almost surely, 2^68363365409 is an apocalyptic number.

It is an amenable number.

68363365409 is a deficient number, since it is larger than the sum of its proper divisors (2553331).

68363365409 is a wasteful number, since it uses less digits than its factorization.

68363365409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553330.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 68363365409 in words is "sixty-eight billion, three hundred sixty-three million, three hundred sixty-five thousand, four hundred nine".