68172310012 has 6 divisors (see below), whose sum is σ = 119301542528. Its totient is φ = 34086155004.

The previous prime is 68172309991. The next prime is 68172310013. The reversal of 68172310012 is 21001327186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68172310013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8521538748 + ... + 8521538755.

Almost surely, 2^68172310012 is an apocalyptic number.

It is an amenable number.

68172310012 is a deficient number, since it is larger than the sum of its proper divisors (51129232516).

68172310012 is a wasteful number, since it uses less digits than its factorization.

68172310012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043077507 (or 17043077505 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 68172310012 its reverse (21001327186), we get a palindrome (89173637198).

The spelling of 68172310012 in words is "sixty-eight billion, one hundred seventy-two million, three hundred ten thousand, twelve".