68687749471333 has 4 divisors (see below), whose sum is σ = 69043644546508. Its totient is φ = 68331854396160.

The previous prime is 68687749471307. The next prime is 68687749471349. The reversal of 68687749471333 is 33317494778686.

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 44379072944644 + 24308676526689 = 6661762^2 + 4930383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68687749471333 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 68687749471333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68687741471333) 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, 177947537298 + ... + 177947537683.

It is an arithmetic number, because the mean of its divisors is an integer number (17260911136627).

Almost surely, 2^{68687749471333} is an apocalyptic number.

It is an amenable number.

68687749471333 is a deficient number, since it is larger than the sum of its proper divisors (355895075175).

68687749471333 is a wasteful number, since it uses less digits than its factorization.

68687749471333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355895075174.

The product of its digits is 3072577536, while the sum is 76.

The spelling of 68687749471333 in words is "sixty-eight trillion, six hundred eighty-seven billion, seven hundred forty-nine million, four hundred seventy-one thousand, three hundred thirty-three".