744816645378 has 24 divisors (see below), whose sum is σ = 1737905506428. Its totient is φ = 229174352352.

The previous prime is 744816645341. The next prime is 744816645413. The reversal of 744816645378 is 873546618447.

744816645378 is a `hidden beast` number, since 7 + 44 + 81 + 66 + 453 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 590695233489 + 154121411889 = 768567^2 + 392583^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1591488325 + ... + 1591488792.

Almost surely, 2^744816645378 is an apocalyptic number.

744816645378 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

744816645378 is an abundant number, since it is smaller than the sum of its proper divisors (993088861050).

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

744816645378 is a wasteful number, since it uses less digits than its factorization.

744816645378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182977138 (or 3182977135 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 744816645378 in words is "seven hundred forty-four billion, eight hundred sixteen million, six hundred forty-five thousand, three hundred seventy-eight".