3645665718 has 8 divisors (see below), whose sum is σ = 7291331448. Its totient is φ = 1215221904.

The previous prime is 3645665701. The next prime is 3645665741. The reversal of 3645665718 is 8175665463.

It is a sphenic number, since it is the product of 3 distinct primes.

3645665718 is an admirable number.

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, 303805471 + ... + 303805482.

It is an arithmetic number, because the mean of its divisors is an integer number (911416431).

Almost surely, 2^3645665718 is an apocalyptic number.

3645665718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645665718 is a wasteful number, since it uses less digits than its factorization.

3645665718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607610958.

The product of its digits is 3628800, while the sum is 51.

The square root of 3645665718 is about 60379.3484396776. The cubic root of 3645665718 is about 1539.0720386322.

The spelling of 3645665718 in words is "three billion, six hundred forty-five million, six hundred sixty-five thousand, seven hundred eighteen".