68140740868 has 12 divisors (see below), whose sum is σ = 121496227020. Its totient is φ = 33427533152.

The previous prime is 68140740847. The next prime is 68140740869. The reversal of 68140740868 is 86804704186.

It can be written as a sum of positive squares in 2 ways, for example, as 45583104004 + 22557636864 = 213502^2 + 150192^2 .

It is not an unprimeable number, because it can be changed into a prime (68140740869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160709083 + ... + 160709506.

It is an arithmetic number, because the mean of its divisors is an integer number (10124685585).

Almost surely, 2^68140740868 is an apocalyptic number.

It is an amenable number.

68140740868 is a deficient number, since it is larger than the sum of its proper divisors (53355486152).

68140740868 is a wasteful number, since it uses less digits than its factorization.

68140740868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321418646 (or 321418644 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 68140740868 in words is "sixty-eight billion, one hundred forty million, seven hundred forty thousand, eight hundred sixty-eight".