744606643 has 16 divisors (see below), whose sum is σ = 831668832. Its totient is φ = 660960000.

The previous prime is 744606631. The next prime is 744606649. The reversal of 744606643 is 346606447.

It is a cyclic number.

It is not a de Polignac number, because 744606643 - 2⁹ = 744606131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 744606596 and 744606605.

It is not an unprimeable number, because it can be changed into a prime (744606649) 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, 76513 + ... + 85693.

It is an arithmetic number, because the mean of its divisors is an integer number (51979302).

Almost surely, 2^744606643 is an apocalyptic number.

744606643 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

744606643 is a deficient number, since it is larger than the sum of its proper divisors (87062189).

744606643 is a wasteful number, since it uses less digits than its factorization.

744606643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9366.

The product of its (nonzero) digits is 290304, while the sum is 40.

The square root of 744606643 is about 27287.4814338004. The cubic root of 744606643 is about 906.3771927825.

The spelling of 744606643 in words is "seven hundred forty-four million, six hundred six thousand, six hundred forty-three".