744461645 has 16 divisors (see below), whose sum is σ = 920298288. Its totient is φ = 577704960.

The previous prime is 744461633. The next prime is 744461647. The reversal of 744461645 is 546164447.

It can be written as a sum of positive squares in 8 ways, for example, as 5654884 + 738806761 = 2378^2 + 27181^2 .

It is not a de Polignac number, because 744461645 - 2¹⁰ = 744460621 is a prime.

It is a super-3 number, since 3×744461645³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744461647) 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, 56375 + ... + 68315.

It is an arithmetic number, because the mean of its divisors is an integer number (57518643).

Almost surely, 2^744461645 is an apocalyptic number.

It is an amenable number.

744461645 is a deficient number, since it is larger than the sum of its proper divisors (175836643).

744461645 is a wasteful number, since it uses less digits than its factorization.

744461645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12320.

The product of its digits is 322560, while the sum is 41.

The square root of 744461645 is about 27284.8244451013. The cubic root of 744461645 is about 906.3183557160.

The spelling of 744461645 in words is "seven hundred forty-four million, four hundred sixty-one thousand, six hundred forty-five".