3869894009856 has 176 divisors, whose sum is σ = 11792830800896. Its totient is φ = 1105250033664.

The previous prime is 3869894009851. The next prime is 3869894009873. The reversal of 3869894009856 is 6589004989683.

It is not an unprimeable number, because it can be changed into a prime (3869894009851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56887095 + ... + 56955081.

Almost surely, 2^{3869894009856} 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 3869894009856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5896415400448).

3869894009856 is an abundant number, since it is smaller than the sum of its proper divisors (7922936791040).

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

3869894009856 is a wasteful number, since it uses less digits than its factorization.

3869894009856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70664 (or 70646 counting only the distinct ones).

The product of its (nonzero) digits is 806215680, while the sum is 75.

The spelling of 3869894009856 in words is "three trillion, eight hundred sixty-nine billion, eight hundred ninety-four million, nine thousand, eight hundred fifty-six".