68135711052385 has 8 divisors (see below), whose sum is σ = 81923487555240. Its totient is φ = 54401479313664.

The previous prime is 68135711052379. The next prime is 68135711052427. The reversal of 68135711052385 is 58325011753186.

It is a happy number.

68135711052385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 38690838278416 + 29444872773969 = 6220196^2 + 5426313^2 .

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 68135711052385 - 2²¹ = 68135708955233 is a prime.

It is a super-2 number, since 2×68135711052385² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13386188232 + ... + 13386193321.

It is an arithmetic number, because the mean of its divisors is an integer number (10240435944405).

Almost surely, 2^{68135711052385} is an apocalyptic number.

It is an amenable number.

68135711052385 is a deficient number, since it is larger than the sum of its proper divisors (13787776502855).

68135711052385 is a wasteful number, since it uses less digits than its factorization.

68135711052385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26772382067.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 68135711052385 in words is "sixty-eight trillion, one hundred thirty-five billion, seven hundred eleven million, fifty-two thousand, three hundred eighty-five".