858109711872 has 160 divisors (see below), whose sum is σ = 2614813926912. Its totient is φ = 244969979904.

The previous prime is 858109711819. The next prime is 858109711883. The reversal of 858109711872 is 278117901858.

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 15 ways as a sum of consecutive naturals, for example, 13117068 + ... + 13182324.

Almost surely, 2^858109711872 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 858109711872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1307406963456).

858109711872 is an abundant number, since it is smaller than the sum of its proper divisors (1756704215040).

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

858109711872 is a wasteful number, since it uses less digits than its factorization.

858109711872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66508 (or 66492 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 57.

The spelling of 858109711872 in words is "eight hundred fifty-eight billion, one hundred nine million, seven hundred eleven thousand, eight hundred seventy-two".