68128671736 has 8 divisors (see below), whose sum is σ = 127741259520. Its totient is φ = 34064335864.

The previous prime is 68128671719. The next prime is 68128671739. The reversal of 68128671736 is 63717682186.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68128671739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258041976 + ... + 4258041991.

It is an arithmetic number, because the mean of its divisors is an integer number (15967657440).

Almost surely, 2^68128671736 is an apocalyptic number.

It is an amenable number.

68128671736 is a deficient number, since it is larger than the sum of its proper divisors (59612587784).

68128671736 is a wasteful number, since it uses less digits than its factorization.

68128671736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8516083973 (or 8516083969 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The spelling of 68128671736 in words is "sixty-eight billion, one hundred twenty-eight million, six hundred seventy-one thousand, seven hundred thirty-six".