68212235217 has 24 divisors (see below), whose sum is σ = 111366919200. Its totient is φ = 36926922816.

The previous prime is 68212235171. The next prime is 68212235243. The reversal of 68212235217 is 71253221286.

It is not a de Polignac number, because 68212235217 - 2²² = 68208040913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68212235317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12208492 + ... + 12214077.

It is an arithmetic number, because the mean of its divisors is an integer number (4640288300).

Almost surely, 2^68212235217 is an apocalyptic number.

It is an amenable number.

68212235217 is a deficient number, since it is larger than the sum of its proper divisors (43154683983).

68212235217 is a wasteful number, since it uses less digits than its factorization.

68212235217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24422605 (or 24422598 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The spelling of 68212235217 in words is "sixty-eight billion, two hundred twelve million, two hundred thirty-five thousand, two hundred seventeen".