68349623311 has 4 divisors (see below), whose sum is σ = 68603711400. Its totient is φ = 68095535224.

The previous prime is 68349623281. The next prime is 68349623317. The reversal of 68349623311 is 11332694386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68349623311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68349623317) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 127043641 + ... + 127044178.

It is an arithmetic number, because the mean of its divisors is an integer number (17150927850).

Almost surely, 2^68349623311 is an apocalyptic number.

68349623311 is a deficient number, since it is larger than the sum of its proper divisors (254088089).

68349623311 is a wasteful number, since it uses less digits than its factorization.

68349623311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254088088.

The product of its digits is 559872, while the sum is 46.

The spelling of 68349623311 in words is "sixty-eight billion, three hundred forty-nine million, six hundred twenty-three thousand, three hundred eleven".