1373223840640 has 128 divisors (see below), whose sum is σ = 3340793898720. Its totient is φ = 539618795520.

The previous prime is 1373223840623. The next prime is 1373223840647. The reversal of 1373223840640 is 460483223731.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373223840647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32264814 + ... + 32307346.

Almost surely, 2^{1373223840640} is an apocalyptic number.

1373223840640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373223840640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670396949360).

1373223840640 is an abundant number, since it is smaller than the sum of its proper divisors (1967570058080).

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

1373223840640 is an equidigital number, since it uses as much as digits as its factorization.

1373223840640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43440 (or 43428 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 1373223840640 in words is "one trillion, three hundred seventy-three billion, two hundred twenty-three million, eight hundred forty thousand, six hundred forty".