3621543845 has 16 divisors (see below), whose sum is σ = 4495346688. Its totient is φ = 2797960320.

The previous prime is 3621543743. The next prime is 3621543851. The reversal of 3621543845 is 5483451263.

It is not a de Polignac number, because 3621543845 - 2²⁰ = 3620495269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51497 + ... + 99473.

It is an arithmetic number, because the mean of its divisors is an integer number (280959168).

Almost surely, 2^3621543845 is an apocalyptic number.

It is an amenable number.

3621543845 is a deficient number, since it is larger than the sum of its proper divisors (873802843).

3621543845 is a wasteful number, since it uses less digits than its factorization.

3621543845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48500.

The product of its digits is 345600, while the sum is 41.

The square root of 3621543845 is about 60179.2642444223. The cubic root of 3621543845 is about 1535.6700551623.

The spelling of 3621543845 in words is "three billion, six hundred twenty-one million, five hundred forty-three thousand, eight hundred forty-five".