68788670821 has 8 divisors (see below), whose sum is σ = 77979060320. Its totient is φ = 60155274672.

The previous prime is 68788670813. The next prime is 68788670843. The reversal of 68788670821 is 12807688786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68788670821 - 2³ = 68788670813 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 68788670821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68788670801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139248075 + ... + 139248568.

It is an arithmetic number, because the mean of its divisors is an integer number (9747382540).

Almost surely, 2^68788670821 is an apocalyptic number.

It is an amenable number.

68788670821 is a deficient number, since it is larger than the sum of its proper divisors (9190389499).

68788670821 is a wasteful number, since it uses less digits than its factorization.

68788670821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278496675.

The product of its (nonzero) digits is 14450688, while the sum is 61.

The spelling of 68788670821 in words is "sixty-eight billion, seven hundred eighty-eight million, six hundred seventy thousand, eight hundred twenty-one".