68544721036 has 24 divisors (see below), whose sum is σ = 134394812496. Its totient is φ = 30314617920.

The previous prime is 68544720931. The next prime is 68544721057. The reversal of 68544721036 is 63012744586.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21050191 + ... + 21053446.

It is an arithmetic number, because the mean of its divisors is an integer number (5599783854).

Almost surely, 2^68544721036 is an apocalyptic number.

It is an amenable number.

68544721036 is a deficient number, since it is larger than the sum of its proper divisors (65850091460).

68544721036 is a wasteful number, since it uses less digits than its factorization.

68544721036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42103689 (or 42103687 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 68544721036 in words is "sixty-eight billion, five hundred forty-four million, seven hundred twenty-one thousand, thirty-six".