3861868818240 has 168 divisors, whose sum is σ = 13283945881128. Its totient is φ = 1029775380480.

The previous prime is 3861868818239. The next prime is 3861868818281. The reversal of 3861868818240 is 428188681683.

3861868818240 is a `hidden beast` number, since 3 + 8 + 618 + 6 + 8 + 8 + 1 + 8 + 2 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 717829173504 + 3144039644736 = 847248^2 + 1773144^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100726114 + ... + 100764446.

Almost surely, 2^{3861868818240} is an apocalyptic number.

3861868818240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3861868818240 is an abundant number, since it is smaller than the sum of its proper divisors (9422077062888).

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

3861868818240 is a wasteful number, since it uses less digits than its factorization.

3861868818240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73337 (or 73324 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 63.

The spelling of 3861868818240 in words is "three trillion, eight hundred sixty-one billion, eight hundred sixty-eight million, eight hundred eighteen thousand, two hundred forty".