68140740867 has 16 divisors (see below), whose sum is σ = 91117591680. Its totient is φ = 45295588800.

The previous prime is 68140740847. The next prime is 68140740869. The reversal of 68140740867 is 76804704186.

It is a happy number.

It is not a de Polignac number, because 68140740867 - 2¹⁸ = 68140478723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68140740869) 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 15 ways as a sum of consecutive naturals, for example, 8501892 + ... + 8509902.

It is an arithmetic number, because the mean of its divisors is an integer number (5694849480).

Almost surely, 2^68140740867 is an apocalyptic number.

68140740867 is a deficient number, since it is larger than the sum of its proper divisors (22976850813).

68140740867 is a wasteful number, since it uses less digits than its factorization.

68140740867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15874.

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 68140740867 in words is "sixty-eight billion, one hundred forty million, seven hundred forty thousand, eight hundred sixty-seven".