68185107313 has 4 divisors (see below), whose sum is σ = 70536317940. Its totient is φ = 65833896688.

The previous prime is 68185107257. The next prime is 68185107377. The reversal of 68185107313 is 31370158186.

68185107313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46166108769 + 22018998544 = 214863^2 + 148388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68185107313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68185107313.

It is not an unprimeable number, because it can be changed into a prime (68185107013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175605270 + ... + 1175605327.

It is an arithmetic number, because the mean of its divisors is an integer number (17634079485).

Almost surely, 2^68185107313 is an apocalyptic number.

It is an amenable number.

68185107313 is a deficient number, since it is larger than the sum of its proper divisors (2351210627).

68185107313 is a wasteful number, since it uses less digits than its factorization.

68185107313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351210626.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 68185107313 in words is "sixty-eight billion, one hundred eighty-five million, one hundred seven thousand, three hundred thirteen".