3861506550 has 96 divisors (see below), whose sum is σ = 10590572160. Its totient is φ = 923270400.

The previous prime is 3861506549. The next prime is 3861506563. The reversal of 3861506550 is 556051683.

It is a super-2 number, since 2×3861506550² = 29822465671385805000, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3861506499 and 3861506508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104421 + ... + 136479.

It is an arithmetic number, because the mean of its divisors is an integer number (110318460).

Almost surely, 2^3861506550 is an apocalyptic number.

3861506550 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 3861506550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5295286080).

3861506550 is an abundant number, since it is smaller than the sum of its proper divisors (6729065610).

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

3861506550 is a wasteful number, since it uses less digits than its factorization.

3861506550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32158 (or 32153 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 3861506550 is about 62141.0214753507. The cubic root of 3861506550 is about 1568.8650634374.

The spelling of 3861506550 in words is "three billion, eight hundred sixty-one million, five hundred six thousand, five hundred fifty".