68921000000 has 196 divisors, whose sum is σ = 175227991428. Its totient is φ = 26896000000.

The previous prime is 68920999997. The next prime is 68921000009. The reversal of 68921000000 is 12986.

The cubic root of 68921000000 is 4100.

It is a perfect power (a cube), and thus also a powerful number.

It can be written as a sum of positive squares in 14 ways, for example, as 603586624 + 68317413376 = 24568^2 + 261376^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68921000009) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1680999980 + ... + 1681000020.

Almost surely, 2^68921000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68921000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87613995714).

68921000000 is an abundant number, since it is smaller than the sum of its proper divisors (106306991428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68921000000 is an frugal number, since it uses more digits than its factorization.

68921000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 68921000000 its reverse (12986), we get a palindrome (68921012986).

The spelling of 68921000000 in words is "sixty-eight billion, nine hundred twenty-one million", and thus it is an aban number.