3645540519 has 4 divisors (see below), whose sum is σ = 4860720696. Its totient is φ = 2430360344.

The previous prime is 3645540487. The next prime is 3645540581. The reversal of 3645540519 is 9150455463.

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

It is a cyclic number.

It is not a de Polignac number, because 3645540519 - 2⁵ = 3645540487 is a prime.

It is a super-2 number, since 2×3645540519² = 26579931351341578722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645540589) 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, 607590084 + ... + 607590089.

It is an arithmetic number, because the mean of its divisors is an integer number (1215180174).

Almost surely, 2^3645540519 is an apocalyptic number.

3645540519 is a deficient number, since it is larger than the sum of its proper divisors (1215180177).

3645540519 is a wasteful number, since it uses less digits than its factorization.

3645540519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215180176.

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 3645540519 is about 60378.3116607280. The cubic root of 3645540519 is about 1539.0544202235.

The spelling of 3645540519 in words is "three billion, six hundred forty-five million, five hundred forty thousand, five hundred nineteen".