8257706785836 has 144 divisors (see below), whose sum is σ = 22058680644000. Its totient is φ = 2700204429312.

The previous prime is 8257706785829. The next prime is 8257706785873. The reversal of 8257706785836 is 6385876077528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 583617690 + ... + 583631838.

It is an arithmetic number, because the mean of its divisors is an integer number (153185282250).

Almost surely, 2^{8257706785836} 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 8257706785836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11029340322000).

8257706785836 is an abundant number, since it is smaller than the sum of its proper divisors (13800973858164).

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

8257706785836 is a wasteful number, since it uses less digits than its factorization.

8257706785836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25550 (or 25536 counting only the distinct ones).

The product of its (nonzero) digits is 948326400, while the sum is 72.

The spelling of 8257706785836 in words is "eight trillion, two hundred fifty-seven billion, seven hundred six million, seven hundred eighty-five thousand, eight hundred thirty-six".