68219606321 has 8 divisors (see below), whose sum is σ = 68333985864. Its totient is φ = 68105318400.

The previous prime is 68219606311. The next prime is 68219606387. The reversal of 68219606321 is 12360691286.

68219606321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8361090721 + 59858515600 = 91439^2 + 244660^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 68219606321 - 2¹⁸ = 68219344177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68219606311) 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, 1557521 + ... + 1600721.

It is an arithmetic number, because the mean of its divisors is an integer number (8541748233).

Almost surely, 2^68219606321 is an apocalyptic number.

It is an amenable number.

68219606321 is a deficient number, since it is larger than the sum of its proper divisors (114379543).

68219606321 is a wasteful number, since it uses less digits than its factorization.

68219606321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45811.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 68219606321 in words is "sixty-eight billion, two hundred nineteen million, six hundred six thousand, three hundred twenty-one".