868540717139 has 8 divisors (see below), whose sum is σ = 880457482512. Its totient is φ = 856624464000.

The previous prime is 868540717133. The next prime is 868540717151. The reversal of 868540717139 is 931717045868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868540717139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868540717133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4355552 + ... + 4550594.

It is an arithmetic number, because the mean of its divisors is an integer number (110057185314).

Almost surely, 2^868540717139 is an apocalyptic number.

868540717139 is a deficient number, since it is larger than the sum of its proper divisors (11916765373).

868540717139 is a wasteful number, since it uses less digits than its factorization.

868540717139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256117.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 868540717139 in words is "eight hundred sixty-eight billion, five hundred forty million, seven hundred seventeen thousand, one hundred thirty-nine".