868529129538 has 32 divisors (see below), whose sum is σ = 2004483326976. Its totient is φ = 245741943888.

The previous prime is 868529129513. The next prime is 868529129539. The reversal of 868529129538 is 835921925868.

It is not an unprimeable number, because it can be changed into a prime (868529129539) 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, 100380456 + ... + 100389107.

It is an arithmetic number, because the mean of its divisors is an integer number (62640103968).

Almost surely, 2^868529129538 is an apocalyptic number.

868529129538 is an abundant number, since it is smaller than the sum of its proper divisors (1135954197438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868529129538 is a wasteful number, since it uses less digits than its factorization.

868529129538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200769678.

The product of its digits is 74649600, while the sum is 66.

The spelling of 868529129538 in words is "eight hundred sixty-eight billion, five hundred twenty-nine million, one hundred twenty-nine thousand, five hundred thirty-eight".