3781859861208 has 256 divisors, whose sum is σ = 11352790794240. Its totient is φ = 1034742643200.

The previous prime is 3781859861177. The next prime is 3781859861249. The reversal of 3781859861208 is 8021689581873.

It is a Harshad number since it is a multiple of its sum of digits (66).

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 63 ways as a sum of consecutive naturals, for example, 30885241 + ... + 31007447.

It is an arithmetic number, because the mean of its divisors is an integer number (44346839040).

Almost surely, 2^{3781859861208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3781859861208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5676395397120).

3781859861208 is an abundant number, since it is smaller than the sum of its proper divisors (7570930933032).

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

3781859861208 is a wasteful number, since it uses less digits than its factorization.

3781859861208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122438 (or 122434 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 66.

The spelling of 3781859861208 in words is "three trillion, seven hundred eighty-one billion, eight hundred fifty-nine million, eight hundred sixty-one thousand, two hundred eight".