3846081866449 has 9 divisors (see below), whose sum is σ = 3852176931099. Its totient is φ = 3839996439720.

The previous prime is 3846081866441. The next prime is 3846081866483. The reversal of 3846081866449 is 9446681806483.

The square root of 3846081866449 is 1961143.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2608247610049 + 1237834256400 = 1615007^2 + 1112580^2 .

It is not a de Polignac number, because 3846081866449 - 2³ = 3846081866441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3846081866441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1731688159 + ... + 1731690379.

It is an arithmetic number, because the mean of its divisors is an integer number (428019659011).

Almost surely, 2^{3846081866449} is an apocalyptic number.

3846081866449 is the 1961143-rd square number.

3846081866449 is the 980572-nd centered octagonal number.

It is an amenable number.

3846081866449 is a deficient number, since it is larger than the sum of its proper divisors (6095064650).

3846081866449 is an frugal number, since it uses more digits than its factorization.

3846081866449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208 (or 3104 counting only the distinct ones).

The product of its (nonzero) digits is 191102976, while the sum is 67.

The spelling of 3846081866449 in words is "three trillion, eight hundred forty-six billion, eighty-one million, eight hundred sixty-six thousand, four hundred forty-nine".