858886916721 has 8 divisors (see below), whose sum is σ = 1145217265920. Its totient is φ = 572573922672.

The previous prime is 858886916711. The next prime is 858886916777. The reversal of 858886916721 is 127619688858.

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

It is not a de Polignac number, because 858886916721 - 2⁵ = 858886916689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (858886916711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4222870 + ... + 4421583.

It is an arithmetic number, because the mean of its divisors is an integer number (143152158240).

Almost surely, 2^858886916721 is an apocalyptic number.

It is an amenable number.

858886916721 is a deficient number, since it is larger than the sum of its proper divisors (286330349199).

858886916721 is a wasteful number, since it uses less digits than its factorization.

858886916721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8677575.

The product of its digits is 92897280, while the sum is 69.

The spelling of 858886916721 in words is "eight hundred fifty-eight billion, eight hundred eighty-six million, nine hundred sixteen thousand, seven hundred twenty-one".