3865052417550 has 192 divisors, whose sum is σ = 10365992129280. Its totient is φ = 949725803520.

The previous prime is 3865052417521. The next prime is 3865052417621. The reversal of 3865052417550 is 557142505683.

3865052417550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3865052417493 and 3865052417502.

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, 538529562 + ... + 538536738.

It is an arithmetic number, because the mean of its divisors is an integer number (53989542340).

Almost surely, 2^{3865052417550} is an apocalyptic number.

3865052417550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865052417550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5182996064640).

3865052417550 is an abundant number, since it is smaller than the sum of its proper divisors (6500939711730).

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

3865052417550 is a wasteful number, since it uses less digits than its factorization.

3865052417550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12355 (or 12350 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 51.

The spelling of 3865052417550 in words is "three trillion, eight hundred sixty-five billion, fifty-two million, four hundred seventeen thousand, five hundred fifty".