44145663012065 has 4 divisors (see below), whose sum is σ = 52974795614484. Its totient is φ = 35316530409648.

The previous prime is 44145663012043. The next prime is 44145663012067. The reversal of 44145663012065 is 56021036654144.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29618161254049 + 14527501758016 = 5442257^2 + 3811496^2 .

It is a cyclic number.

It is not a de Polignac number, because 44145663012065 - 2¹⁸ = 44145662749921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44145663012067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4414566301202 + ... + 4414566301211.

It is an arithmetic number, because the mean of its divisors is an integer number (13243698903621).

Almost surely, 2^{44145663012065} is an apocalyptic number.

It is an amenable number.

44145663012065 is a deficient number, since it is larger than the sum of its proper divisors (8829132602419).

44145663012065 is an equidigital number, since it uses as much as digits as its factorization.

44145663012065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8829132602418.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 44145663012065 in words is "forty-four trillion, one hundred forty-five billion, six hundred sixty-three million, twelve thousand, sixty-five".