3861505855 has 16 divisors (see below), whose sum is σ = 4795409664. Its totient is φ = 2981975040.

The previous prime is 3861505849. The next prime is 3861505867. The reversal of 3861505855 is 5585051683.

It is not a de Polignac number, because 3861505855 - 2³ = 3861505847 is a prime.

It is a super-2 number, since 2×3861505855² = 29822454936398562050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30159 + ... + 92911.

It is an arithmetic number, because the mean of its divisors is an integer number (299713104).

Almost surely, 2^3861505855 is an apocalyptic number.

3861505855 is a deficient number, since it is larger than the sum of its proper divisors (933903809).

3861505855 is a wasteful number, since it uses less digits than its factorization.

3861505855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63186.

The product of its (nonzero) digits is 720000, while the sum is 46.

The square root of 3861505855 is about 62141.0158832313. The cubic root of 3861505855 is about 1568.8649693151.

The spelling of 3861505855 in words is "three billion, eight hundred sixty-one million, five hundred five thousand, eight hundred fifty-five".