40444043321 has 96 divisors (see below), whose sum is σ = 50187392640. Its totient is φ = 32267289600.

The previous prime is 40444043303. The next prime is 40444043327. The reversal of 40444043321 is 12334044404.

It is a happy number.

It is not a de Polignac number, because 40444043321 - 2²⁶ = 40376934457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40444043327) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 371046215 + ... + 371046323.

It is an arithmetic number, because the mean of its divisors is an integer number (522785340).

Almost surely, 2^40444043321 is an apocalyptic number.

40444043321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40444043321 is a deficient number, since it is larger than the sum of its proper divisors (9743349319).

40444043321 is a wasteful number, since it uses less digits than its factorization.

40444043321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 40444043321 its reverse (12334044404), we get a palindrome (52778087725).

The spelling of 40444043321 in words is "forty billion, four hundred forty-four million, forty-three thousand, three hundred twenty-one".