865864429444 has 96 divisors (see below), whose sum is σ = 1937444382720. Its totient is φ = 329615350272.

The previous prime is 865864429433. The next prime is 865864429459. The reversal of 865864429444 is 444924468568.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2196559 + ... + 2560585.

It is an arithmetic number, because the mean of its divisors is an integer number (20181712320).

Almost surely, 2^865864429444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865864429444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968722191360).

865864429444 is an abundant number, since it is smaller than the sum of its proper divisors (1071579953276).

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

865864429444 is a wasteful number, since it uses less digits than its factorization.

865864429444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364337 (or 364335 counting only the distinct ones).

The product of its digits is 212336640, while the sum is 64.

The spelling of 865864429444 in words is "eight hundred sixty-five billion, eight hundred sixty-four million, four hundred twenty-nine thousand, four hundred forty-four".