744402561 has 24 divisors (see below), whose sum is σ = 1155669984. Its totient is φ = 424972800.

The previous prime is 744402557. The next prime is 744402707. The reversal of 744402561 is 165204447.

744402561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 744402561 - 2² = 744402557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (744402551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233766 + ... + 236928.

It is an arithmetic number, because the mean of its divisors is an integer number (48152916).

Almost surely, 2^744402561 is an apocalyptic number.

It is an amenable number.

744402561 is a deficient number, since it is larger than the sum of its proper divisors (411267423).

744402561 is a wasteful number, since it uses less digits than its factorization.

744402561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 744402561 is about 27283.7416972086. The cubic root of 744402561 is about 906.2943785101.

The spelling of 744402561 in words is "seven hundred forty-four million, four hundred two thousand, five hundred sixty-one".