3645481446565 has 32 divisors (see below), whose sum is σ = 5010626718720. Its totient is φ = 2494209859584.

The previous prime is 3645481446449. The next prime is 3645481446569. The reversal of 3645481446565 is 5656441845463.

It is a cyclic number.

It is not a de Polignac number, because 3645481446565 - 2¹⁵ = 3645481413797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645481446569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30566289 + ... + 30685321.

It is an arithmetic number, because the mean of its divisors is an integer number (156582084960).

Almost surely, 2^{3645481446565} is an apocalyptic number.

3645481446565 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3645481446565 is a deficient number, since it is larger than the sum of its proper divisors (1365145272155).

3645481446565 is a wasteful number, since it uses less digits than its factorization.

3645481446565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120981.

The product of its digits is 165888000, while the sum is 61.

The spelling of 3645481446565 in words is "three trillion, six hundred forty-five billion, four hundred eighty-one million, four hundred forty-six thousand, five hundred sixty-five".