69381668717 has 4 divisors (see below), whose sum is σ = 70690756860. Its totient is φ = 68072580576.

The previous prime is 69381668597. The next prime is 69381668723. The reversal of 69381668717 is 71786618396.

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 22044528676 + 47337140041 = 148474^2 + 217571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69381668717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69381668717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69381668767) 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, 654543992 + ... + 654544097.

It is an arithmetic number, because the mean of its divisors is an integer number (17672689215).

Almost surely, 2^69381668717 is an apocalyptic number.

It is an amenable number.

69381668717 is a deficient number, since it is larger than the sum of its proper divisors (1309088143).

69381668717 is a wasteful number, since it uses less digits than its factorization.

69381668717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309088142.

The product of its digits is 18289152, while the sum is 62.

The spelling of 69381668717 in words is "sixty-nine billion, three hundred eighty-one million, six hundred sixty-eight thousand, seven hundred seventeen".