40444634065 has 16 divisors (see below), whose sum is σ = 54653630976. Its totient is φ = 28465430400.

The previous prime is 40444634017. The next prime is 40444634081. The reversal of 40444634065 is 56043644404.

It is not a de Polignac number, because 40444634065 - 2⁹ = 40444633553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11858892 + ... + 11862301.

It is an arithmetic number, because the mean of its divisors is an integer number (3415851936).

Almost surely, 2^40444634065 is an apocalyptic number.

It is an amenable number.

40444634065 is a deficient number, since it is larger than the sum of its proper divisors (14208996911).

40444634065 is a wasteful number, since it uses less digits than its factorization.

40444634065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23721240.

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 40444634065 in words is "forty billion, four hundred forty-four million, six hundred thirty-four thousand, sixty-five".