68211712005621 has 8 divisors (see below), whose sum is σ = 95735736148320. Its totient is φ = 43081081266672.

The previous prime is 68211712005599. The next prime is 68211712005649. The reversal of 68211712005621 is 12650021711286.

It is a happy number.

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

It is not a de Polignac number, because 68211712005621 - 2¹⁷ = 68211711874549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68211712005221) 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, 598348350870 + ... + 598348350983.

It is an arithmetic number, because the mean of its divisors is an integer number (11966967018540).

Almost surely, 2^{68211712005621} is an apocalyptic number.

It is an amenable number.

68211712005621 is a deficient number, since it is larger than the sum of its proper divisors (27524024142699).

68211712005621 is a wasteful number, since it uses less digits than its factorization.

68211712005621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196696701875.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 68211712005621 in words is "sixty-eight trillion, two hundred eleven billion, seven hundred twelve million, five thousand, six hundred twenty-one".