68172115663 has 8 divisors (see below), whose sum is σ = 68557703760. Its totient is φ = 67786626240.

The previous prime is 68172115657. The next prime is 68172115679. The reversal of 68172115663 is 36651127186.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68172115663 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 (68172112663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1699128 + ... + 1738786.

It is an arithmetic number, because the mean of its divisors is an integer number (8569712970).

Almost surely, 2^68172115663 is an apocalyptic number.

68172115663 is a deficient number, since it is larger than the sum of its proper divisors (385588097).

68172115663 is a wasteful number, since it uses less digits than its factorization.

68172115663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49337.

The product of its digits is 362880, while the sum is 46.

The spelling of 68172115663 in words is "sixty-eight billion, one hundred seventy-two million, one hundred fifteen thousand, six hundred sixty-three".