68356129792 has 22 divisors (see below), whose sum is σ = 136645507598. Its totient is φ = 34178064384.

The previous prime is 68356129763. The next prime is 68356129799. The reversal of 68356129792 is 29792165386.

It can be written as a sum of positive squares in only one way, i.e., 66061336576 + 2294793216 = 257024^2 + 47904^2 .

It is not an unprimeable number, because it can be changed into a prime (68356129799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33375993 + ... + 33378040.

Almost surely, 2^68356129792 is an apocalyptic number.

It is an amenable number.

68356129792 is a deficient number, since it is larger than the sum of its proper divisors (68289377806).

68356129792 is an equidigital number, since it uses as much as digits as its factorization.

68356129792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66754053 (or 66754035 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 58.

The spelling of 68356129792 in words is "sixty-eight billion, three hundred fifty-six million, one hundred twenty-nine thousand, seven hundred ninety-two".