744642646246447 has 4 divisors (see below), whose sum is σ = 801922849803880. Its totient is φ = 687362442689016.

The previous prime is 744642646246403. The next prime is 744642646246453.

It is a happy number.

744642646246447 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 744642646246447 - 2³¹ = 744640498762799 is a prime.

It is a super-2 number, since 2×744642646246447² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744642646226447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28640101778697 + ... + 28640101778722.

It is an arithmetic number, because the mean of its divisors is an integer number (200480712450970).

Almost surely, 2^{744642646246447} is an apocalyptic number.

744642646246447 is a deficient number, since it is larger than the sum of its proper divisors (57280203557433).

744642646246447 is a wasteful number, since it uses less digits than its factorization.

744642646246447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57280203557432.

The product of its digits is 4161798144, while the sum is 70.

The spelling of 744642646246447 in words is "seven hundred forty-four trillion, six hundred forty-two billion, six hundred forty-six million, two hundred forty-six thousand, four hundred forty-seven".