68061556896 has 24 divisors (see below), whose sum is σ = 178661587104. Its totient is φ = 22687185600.

The previous prime is 68061556889. The next prime is 68061556897. The reversal of 68061556896 is 69865516086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (68061556897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354487180 + ... + 354487371.

It is an arithmetic number, because the mean of its divisors is an integer number (7444232796).

Almost surely, 2^68061556896 is an apocalyptic number.

It is an amenable number.

68061556896 is an abundant number, since it is smaller than the sum of its proper divisors (110600030208).

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

68061556896 is a wasteful number, since it uses less digits than its factorization.

68061556896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708974564 (or 708974556 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 68061556896 in words is "sixty-eight billion, sixty-one million, five hundred fifty-six thousand, eight hundred ninety-six".