440268997409 has 4 divisors (see below), whose sum is σ = 440270394516. Its totient is φ = 440267600304.

The previous prime is 440268997391. The next prime is 440268997439. The reversal of 440268997409 is 904799862044.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 386585497600 + 53683499809 = 621760^2 + 231697^2 .

It is a cyclic number.

It is not a de Polignac number, because 440268997409 - 2¹⁶ = 440268931873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440268997439) 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, 21647 + ... + 938619.

It is an arithmetic number, because the mean of its divisors is an integer number (110067598629).

Almost surely, 2^440268997409 is an apocalyptic number.

It is an amenable number.

440268997409 is a deficient number, since it is larger than the sum of its proper divisors (1397107).

440268997409 is an equidigital number, since it uses as much as digits as its factorization.

440268997409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397106.

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 440268997409 in words is "four hundred forty billion, two hundred sixty-eight million, nine hundred ninety-seven thousand, four hundred nine".