2644040401 has 8 divisors (see below), whose sum is σ = 2655926208. Its totient is φ = 2632182000.

The previous prime is 2644040393. The next prime is 2644040407. The reversal of 2644040401 is 1040404462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2644040401 - 2³ = 2644040393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644040407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200316 + ... + 213106.

It is an arithmetic number, because the mean of its divisors is an integer number (331990776).

Almost surely, 2^2644040401 is an apocalyptic number.

It is an amenable number.

2644040401 is a deficient number, since it is larger than the sum of its proper divisors (11885807).

2644040401 is a wasteful number, since it uses less digits than its factorization.

2644040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13703.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 2644040401 is about 51420.2333814229. The cubic root of 2644040401 is about 1382.7893593645.

Adding to 2644040401 its reverse (1040404462), we get a palindrome (3684444863).

The spelling of 2644040401 in words is "two billion, six hundred forty-four million, forty thousand, four hundred one".