42644004449 has 4 divisors (see below), whose sum is σ = 42867271680. Its totient is φ = 42420737220.

The previous prime is 42644004409. The next prime is 42644004497. The reversal of 42644004449 is 94440044624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42644004449 is a prime.

It is a super-2 number, since 2×42644004449² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42644004409) 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, 111633329 + ... + 111633710.

It is an arithmetic number, because the mean of its divisors is an integer number (10716817920).

Almost surely, 2^42644004449 is an apocalyptic number.

It is an amenable number.

42644004449 is a deficient number, since it is larger than the sum of its proper divisors (223267231).

42644004449 is a wasteful number, since it uses less digits than its factorization.

42644004449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223267230.

The product of its (nonzero) digits is 442368, while the sum is 41.

The spelling of 42644004449 in words is "forty-two billion, six hundred forty-four million, four thousand, four hundred forty-nine".