68959825721 has 8 divisors (see below), whose sum is σ = 69994917504. Its totient is φ = 67926507040.

The previous prime is 68959825703. The next prime is 68959825741. The reversal of 68959825721 is 12752895986.

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 68959825721 - 2¹⁰ = 68959824697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68959825741) 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, 364805 + ... + 520578.

It is an arithmetic number, because the mean of its divisors is an integer number (8749364688).

Almost surely, 2^68959825721 is an apocalyptic number.

It is an amenable number.

68959825721 is a deficient number, since it is larger than the sum of its proper divisors (1035091783).

68959825721 is a wasteful number, since it uses less digits than its factorization.

68959825721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886551.

The product of its digits is 21772800, while the sum is 62.

The spelling of 68959825721 in words is "sixty-eight billion, nine hundred fifty-nine million, eight hundred twenty-five thousand, seven hundred twenty-one".