3645428981375 has 32 divisors (see below), whose sum is σ = 4590562816320. Its totient is φ = 2890116028800.

The previous prime is 3645428981291. The next prime is 3645428981377. The reversal of 3645428981375 is 5731898245463.

It is not a de Polignac number, because 3645428981375 - 2²⁰ = 3645427932799 is a prime.

It is a super-3 number, since 3×3645428981375³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645428981377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7192817 + ... + 7682933.

It is an arithmetic number, because the mean of its divisors is an integer number (143455088010).

Almost surely, 2^{3645428981375} is an apocalyptic number.

3645428981375 is a deficient number, since it is larger than the sum of its proper divisors (945133834945).

3645428981375 is a wasteful number, since it uses less digits than its factorization.

3645428981375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490668 (or 490658 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 65.

The spelling of 3645428981375 in words is "three trillion, six hundred forty-five billion, four hundred twenty-eight million, nine hundred eighty-one thousand, three hundred seventy-five".