3969850859520 has 1344 divisors, whose sum is σ = 16314640163136. Its totient is φ = 816505159680.

The previous prime is 3969850859497. The next prime is 3969850859563. The reversal of 3969850859520 is 259580589693.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3209256342 + ... + 3209257578.

It is an arithmetic number, because the mean of its divisors is an integer number (12138869169).

Almost surely, 2^{3969850859520} is an apocalyptic number.

3969850859520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3969850859520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8157320081568).

3969850859520 is an abundant number, since it is smaller than the sum of its proper divisors (12344789303616).

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

3969850859520 is a wasteful number, since it uses less digits than its factorization.

3969850859520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 209952000, while the sum is 69.

The spelling of 3969850859520 in words is "three trillion, nine hundred sixty-nine billion, eight hundred fifty million, eight hundred fifty-nine thousand, five hundred twenty".