68142664877 has 16 divisors (see below), whose sum is σ = 78244638720. Its totient is φ = 58132680048.

The previous prime is 68142664781. The next prime is 68142664907. The reversal of 68142664877 is 77846624186.

It is a cyclic number.

It is not a de Polignac number, because 68142664877 - 2²⁶ = 68075556013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68142661877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8778524 + ... + 8786282.

It is an arithmetic number, because the mean of its divisors is an integer number (4890289920).

Almost surely, 2^68142664877 is an apocalyptic number.

It is an amenable number.

68142664877 is a deficient number, since it is larger than the sum of its proper divisors (10101973843).

68142664877 is a wasteful number, since it uses less digits than its factorization.

68142664877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13520.

The product of its digits is 21676032, while the sum is 59.

The spelling of 68142664877 in words is "sixty-eight billion, one hundred forty-two million, six hundred sixty-four thousand, eight hundred seventy-seven".