3645642345 has 16 divisors (see below), whose sum is σ = 6034167360. Its totient is φ = 1877296064.

The previous prime is 3645642317. The next prime is 3645642349. The reversal of 3645642345 is 5432465463.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3645642345 - 2⁶ = 3645642281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3645642297 and 3645642306.

It is not an unprimeable number, because it can be changed into a prime (3645642349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4189959 + ... + 4190828.

It is an arithmetic number, because the mean of its divisors is an integer number (377135460).

Almost surely, 2^3645642345 is an apocalyptic number.

It is an amenable number.

3645642345 is a deficient number, since it is larger than the sum of its proper divisors (2388525015).

3645642345 is a wasteful number, since it uses less digits than its factorization.

3645642345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380824.

The product of its digits is 1036800, while the sum is 42.

The square root of 3645642345 is about 60379.1548880903. The cubic root of 3645642345 is about 1539.0687495386.

The spelling of 3645642345 in words is "three billion, six hundred forty-five million, six hundred forty-two thousand, three hundred forty-five".