3644730085 has 4 divisors (see below), whose sum is σ = 4373676108. Its totient is φ = 2915784064.

The previous prime is 3644730083. The next prime is 3644730139. The reversal of 3644730085 is 5800374463.

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 2915352036 + 729378049 = 53994^2 + 27007^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644730085 - 2¹ = 3644730083 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 (3644730083) 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, 364473004 + ... + 364473013.

It is an arithmetic number, because the mean of its divisors is an integer number (1093419027).

Almost surely, 2^3644730085 is an apocalyptic number.

It is an amenable number.

3644730085 is a deficient number, since it is larger than the sum of its proper divisors (728946023).

3644730085 is an equidigital number, since it uses as much as digits as its factorization.

3644730085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728946022.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 3644730085 is about 60371.5999870800. The cubic root of 3644730085 is about 1538.9403635686.

The spelling of 3644730085 in words is "three billion, six hundred forty-four million, seven hundred thirty thousand, eighty-five".