74644318449 has 16 divisors (see below), whose sum is σ = 111598713600. Its totient is φ = 49306336848.

The previous prime is 74644318439. The next prime is 74644318457. The reversal of 74644318449 is 94481344647.

It is a happy number.

74644318449 is a `hidden beast` number, since 74 + 64 + 431 + 84 + 4 + 9 = 666.

It is not a de Polignac number, because 74644318449 - 2⁵ = 74644318417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74644318395 and 74644318404.

It is not an unprimeable number, because it can be changed into a prime (74644318439) 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 15 ways as a sum of consecutive naturals, for example, 12678729 + ... + 12684614.

It is an arithmetic number, because the mean of its divisors is an integer number (6974919600).

Almost surely, 2^74644318449 is an apocalyptic number.

It is an amenable number.

74644318449 is a deficient number, since it is larger than the sum of its proper divisors (36954395151).

74644318449 is a wasteful number, since it uses less digits than its factorization.

74644318449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25363461 (or 25363455 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The spelling of 74644318449 in words is "seventy-four billion, six hundred forty-four million, three hundred eighteen thousand, four hundred forty-nine".