3643325645 has 4 divisors (see below), whose sum is σ = 4371990780. Its totient is φ = 2914660512.

The previous prime is 3643325599. The next prime is 3643325669. The reversal of 3643325645 is 5465233463.

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 1733723044 + 1909602601 = 41638^2 + 43699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3643325645 is a prime.

It is a super-3 number, since 3×3643325645³ (a number of 30 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 364332560 + ... + 364332569.

It is an arithmetic number, because the mean of its divisors is an integer number (1092997695).

Almost surely, 2^3643325645 is an apocalyptic number.

It is an amenable number.

3643325645 is a deficient number, since it is larger than the sum of its proper divisors (728665135).

3643325645 is an equidigital number, since it uses as much as digits as its factorization.

3643325645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728665134.

The product of its digits is 777600, while the sum is 41.

The square root of 3643325645 is about 60359.9672382284. The cubic root of 3643325645 is about 1538.7426692696.

The spelling of 3643325645 in words is "three billion, six hundred forty-three million, three hundred twenty-five thousand, six hundred forty-five".