3821855156 has 18 divisors (see below), whose sum is σ = 7780205538. Its totient is φ = 1637937840.

The previous prime is 3821855137. The next prime is 3821855201. The reversal of 3821855156 is 6515581283.

It can be written as a sum of positive squares in only one way, i.e., 2360016400 + 1461838756 = 48580^2 + 38234^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9749435 + ... + 9749826.

It is an arithmetic number, because the mean of its divisors is an integer number (432233641).

Almost surely, 2^3821855156 is an apocalyptic number.

It is an amenable number.

3821855156 is an abundant number, since it is smaller than the sum of its proper divisors (3958350382).

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

3821855156 is a wasteful number, since it uses less digits than its factorization.

3821855156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19499279 (or 19499270 counting only the distinct ones).

The product of its digits is 288000, while the sum is 44.

The square root of 3821855156 is about 61821.1545993764. The cubic root of 3821855156 is about 1563.4766800069.

The spelling of 3821855156 in words is "three billion, eight hundred twenty-one million, eight hundred fifty-five thousand, one hundred fifty-six".