68192721836917 has 8 divisors (see below), whose sum is σ = 68233001872896. Its totient is φ = 68152452771312.

The previous prime is 68192721836857. The next prime is 68192721836933. The reversal of 68192721836917 is 71963812729186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68192721836917 - 2¹¹ = 68192721834869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68192721836717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9709923 + ... + 15187759.

It is an arithmetic number, because the mean of its divisors is an integer number (8529125234112).

Almost surely, 2^{68192721836917} is an apocalyptic number.

It is an amenable number.

68192721836917 is a deficient number, since it is larger than the sum of its proper divisors (40280035979).

68192721836917 is a wasteful number, since it uses less digits than its factorization.

68192721836917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485187.

The product of its digits is 109734912, while the sum is 70.

The spelling of 68192721836917 in words is "sixty-eight trillion, one hundred ninety-two billion, seven hundred twenty-one million, eight hundred thirty-six thousand, nine hundred seventeen".