68221350912 has 352 divisors, whose sum is σ = 215961185664. Its totient is φ = 18874368000.

The previous prime is 68221350871. The next prime is 68221350917. The reversal of 68221350912 is 21905312286.

It is a tau number, because it is divible by the number of its divisors (352).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221350917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42610912 + ... + 42612512.

Almost surely, 2^68221350912 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 68221350912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107980592832).

68221350912 is an abundant number, since it is smaller than the sum of its proper divisors (147739834752).

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

68221350912 is a wasteful number, since it uses less digits than its factorization.

68221350912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1727 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 68221350912 in words is "sixty-eight billion, two hundred twenty-one million, three hundred fifty thousand, nine hundred twelve".