68205521072 has 40 divisors (see below), whose sum is σ = 144998625744. Its totient is φ = 30885513984.

The previous prime is 68205521071. The next prime is 68205521077. The reversal of 68205521072 is 27012550286.

It is not an unprimeable number, because it can be changed into a prime (68205521071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3082478 + ... + 3104525.

Almost surely, 2^68205521072 is an apocalyptic number.

It is an amenable number.

68205521072 is an abundant number, since it is smaller than the sum of its proper divisors (76793104672).

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

68205521072 is a wasteful number, since it uses less digits than its factorization.

68205521072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6187077 (or 6187071 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 68205521072 in words is "sixty-eight billion, two hundred five million, five hundred twenty-one thousand, seventy-two".