40044002409 has 12 divisors (see below), whose sum is σ = 60356177856. Its totient is φ = 25535305752.

The previous prime is 40044002393. The next prime is 40044002413. The reversal of 40044002409 is 90420044004.

It is not a de Polignac number, because 40044002409 - 2⁴ = 40044002393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40044002429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96724437 + ... + 96724850.

It is an arithmetic number, because the mean of its divisors is an integer number (5029681488).

Almost surely, 2^40044002409 is an apocalyptic number.

It is an amenable number.

40044002409 is a deficient number, since it is larger than the sum of its proper divisors (20312175447).

40044002409 is a wasteful number, since it uses less digits than its factorization.

40044002409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193449316 (or 193449313 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 40044002409 in words is "forty billion, forty-four million, two thousand, four hundred nine".