68049210021 has 8 divisors (see below), whose sum is σ = 97711686240. Its totient is φ = 41876436912.

The previous prime is 68049210013. The next prime is 68049210037. The reversal of 68049210021 is 12001294086.

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

It is not a de Polignac number, because 68049210021 - 2³ = 68049210013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68049210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872425731 + ... + 872425808.

It is an arithmetic number, because the mean of its divisors is an integer number (12213960780).

Almost surely, 2^68049210021 is an apocalyptic number.

It is an amenable number.

68049210021 is a deficient number, since it is larger than the sum of its proper divisors (29662476219).

68049210021 is a wasteful number, since it uses less digits than its factorization.

68049210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744851555.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 68049210021 in words is "sixty-eight billion, forty-nine million, two hundred ten thousand, twenty-one".