1393744440506 has 16 divisors (see below), whose sum is σ = 2303253642528. Its totient is φ = 627247722000.

The previous prime is 1393744440463. The next prime is 1393744440521. The reversal of 1393744440506 is 6050444473931.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 313621640 + ... + 313626083.

It is an arithmetic number, because the mean of its divisors is an integer number (143953352658).

Almost surely, 2^{1393744440506} is an apocalyptic number.

1393744440506 is a deficient number, since it is larger than the sum of its proper divisors (909509202022).

1393744440506 is a wasteful number, since it uses less digits than its factorization.

1393744440506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627247837.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 1393744440506 in words is "one trillion, three hundred ninety-three billion, seven hundred forty-four million, four hundred forty thousand, five hundred six".