68335871213 has 4 divisors (see below), whose sum is σ = 68341605948. Its totient is φ = 68330136480.

The previous prime is 68335871209. The next prime is 68335871221. The reversal of 68335871213 is 31217853386.

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 16569610729 + 51766260484 = 128723^2 + 227522^2 .

It is a cyclic number.

It is not a de Polignac number, because 68335871213 - 2² = 68335871209 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 (68335871203) 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, 2849456 + ... + 2873337.

It is an arithmetic number, because the mean of its divisors is an integer number (17085401487).

Almost surely, 2^68335871213 is an apocalyptic number.

It is an amenable number.

68335871213 is a deficient number, since it is larger than the sum of its proper divisors (5734735).

68335871213 is a wasteful number, since it uses less digits than its factorization.

68335871213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734734.

The product of its digits is 725760, while the sum is 47.

The spelling of 68335871213 in words is "sixty-eight billion, three hundred thirty-five million, eight hundred seventy-one thousand, two hundred thirteen".