3855021546161 has 8 divisors (see below), whose sum is σ = 3890313993384. Its totient is φ = 3819882879360.

The previous prime is 3855021546133. The next prime is 3855021546179. The reversal of 3855021546161 is 1616451205583.

It can be written as a sum of positive squares in 4 ways, for example, as 367091786161 + 3487929760000 = 605881^2 + 1867600^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3855021546161 - 2¹⁸ = 3855021284017 is a prime.

It is a super-2 number, since 2×3855021546161² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3855021146161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38394740 + ... + 38495013.

It is an arithmetic number, because the mean of its divisors is an integer number (486289249173).

Almost surely, 2^{3855021546161} is an apocalyptic number.

It is an amenable number.

3855021546161 is a deficient number, since it is larger than the sum of its proper divisors (35292447223).

3855021546161 is a wasteful number, since it uses less digits than its factorization.

3855021546161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76890211.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 3855021546161 in words is "three trillion, eight hundred fifty-five billion, twenty-one million, five hundred forty-six thousand, one hundred sixty-one".