744318581436 has 144 divisors (see below), whose sum is σ = 1986647164320. Its totient is φ = 240985704960.

The previous prime is 744318581431. The next prime is 744318581437. The reversal of 744318581436 is 634185813447.

744318581436 is a `hidden beast` number, since 7 + 4 + 4 + 3 + 18 + 581 + 43 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744318581431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36133956 + ... + 36154548.

Almost surely, 2^744318581436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 744318581436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993323582160).

744318581436 is an abundant number, since it is smaller than the sum of its proper divisors (1242328582884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

744318581436 is a wasteful number, since it uses less digits than its factorization.

744318581436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20873 (or 20822 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 744318581436 in words is "seven hundred forty-four billion, three hundred eighteen million, five hundred eighty-one thousand, four hundred thirty-six".