3820543165 has 4 divisors (see below), whose sum is σ = 4584651804. Its totient is φ = 3056434528.

The previous prime is 3820543099. The next prime is 3820543169. The reversal of 3820543165 is 5613450283.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2739580281 + 1080962884 = 52341^2 + 32878^2 .

It is a cyclic number.

It is not a de Polignac number, because 3820543165 - 2⁹ = 3820542653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820543169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382054312 + ... + 382054321.

It is an arithmetic number, because the mean of its divisors is an integer number (1146162951).

Almost surely, 2^3820543165 is an apocalyptic number.

It is an amenable number.

3820543165 is a deficient number, since it is larger than the sum of its proper divisors (764108639).

3820543165 is an equidigital number, since it uses as much as digits as its factorization.

3820543165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764108638.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 3820543165 is about 61810.5425069219. The cubic root of 3820543165 is about 1563.2977527566.

The spelling of 3820543165 in words is "three billion, eight hundred twenty million, five hundred forty-three thousand, one hundred sixty-five".