744309012561 has 4 divisors (see below), whose sum is σ = 992412016752. Its totient is φ = 496206008372.

The previous prime is 744309012541. The next prime is 744309012599. The reversal of 744309012561 is 165210903447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 744309012561 - 2¹⁸ = 744308750417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (744309012541) 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 3 ways as a sum of consecutive naturals, for example, 124051502091 + ... + 124051502096.

It is an arithmetic number, because the mean of its divisors is an integer number (248103004188).

Almost surely, 2^744309012561 is an apocalyptic number.

It is an amenable number.

744309012561 is a deficient number, since it is larger than the sum of its proper divisors (248103004191).

744309012561 is a wasteful number, since it uses less digits than its factorization.

744309012561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248103004190.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 744309012561 in words is "seven hundred forty-four billion, three hundred nine million, twelve thousand, five hundred sixty-one".