861868718 has 8 divisors (see below), whose sum is σ = 1294477848. Its totient is φ = 430376104.

The previous prime is 861868697. The next prime is 861868753. The reversal of 861868718 is 817868168.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 861868718.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 277196 + ... + 280287.

It is an arithmetic number, because the mean of its divisors is an integer number (161809731).

Almost surely, 2^861868718 is an apocalyptic number.

861868718 is a deficient number, since it is larger than the sum of its proper divisors (432609130).

861868718 is a wasteful number, since it uses less digits than its factorization.

861868718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558258.

The product of its digits is 1032192, while the sum is 53.

The square root of 861868718 is about 29357.6006853421. The cubic root of 861868718 is about 951.6568383670.

The spelling of 861868718 in words is "eight hundred sixty-one million, eight hundred sixty-eight thousand, seven hundred eighteen".