68775779944 has 8 divisors (see below), whose sum is σ = 128954587410. Its totient is φ = 34387889968.

The previous prime is 68775779899. The next prime is 68775779981. The reversal of 68775779944 is 44997757786.

It can be written as a sum of positive squares in only one way, i.e., 68575896900 + 199883044 = 261870^2 + 14138^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4298486239 + ... + 4298486254.

Almost surely, 2^68775779944 is an apocalyptic number.

It is an amenable number.

68775779944 is a deficient number, since it is larger than the sum of its proper divisors (60178807466).

68775779944 is a wasteful number, since it uses less digits than its factorization.

68775779944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8596972499 (or 8596972495 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 73.

The spelling of 68775779944 in words is "sixty-eight billion, seven hundred seventy-five million, seven hundred seventy-nine thousand, nine hundred forty-four".