744544786321 has 16 divisors (see below), whose sum is σ = 881322359040. Its totient is φ = 615424340160.

The previous prime is 744544786303. The next prime is 744544786369. The reversal of 744544786321 is 123687445447.

It is a happy number.

It is not a de Polignac number, because 744544786321 - 2¹¹ = 744544784273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744544786121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2067021 + ... + 2400346.

It is an arithmetic number, because the mean of its divisors is an integer number (55082647440).

Almost surely, 2^744544786321 is an apocalyptic number.

It is an amenable number.

744544786321 is a deficient number, since it is larger than the sum of its proper divisors (136777572719).

744544786321 is a wasteful number, since it uses less digits than its factorization.

744544786321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468224.

The product of its digits is 18063360, while the sum is 55.

The spelling of 744544786321 in words is "seven hundred forty-four billion, five hundred forty-four million, seven hundred eighty-six thousand, three hundred twenty-one".