864285857878 has 8 divisors (see below), whose sum is σ = 1364661880920. Its totient is φ = 409398564240.

The previous prime is 864285857873. The next prime is 864285857879. The reversal of 864285857878 is 878758582468.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864285857873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11372182303 + ... + 11372182378.

It is an arithmetic number, because the mean of its divisors is an integer number (170582735115).

Almost surely, 2^864285857878 is an apocalyptic number.

864285857878 is a deficient number, since it is larger than the sum of its proper divisors (500376023042).

864285857878 is a wasteful number, since it uses less digits than its factorization.

864285857878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22744364702.

The product of its digits is 1926758400, while the sum is 76.

The spelling of 864285857878 in words is "eight hundred sixty-four billion, two hundred eighty-five million, eight hundred fifty-seven thousand, eight hundred seventy-eight".