1378305887844 has 144 divisors (see below), whose sum is σ = 3538102171968. Its totient is φ = 416148934656.

The previous prime is 1378305887839. The next prime is 1378305887887. The reversal of 1378305887844 is 4487885038731.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53686699 + ... + 53712365.

It is an arithmetic number, because the mean of its divisors is an integer number (24570153972).

Almost surely, 2^{1378305887844} 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 1378305887844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769051085984).

1378305887844 is an abundant number, since it is smaller than the sum of its proper divisors (2159796284124).

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

1378305887844 is a wasteful number, since it uses less digits than its factorization.

1378305887844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26062 (or 26031 counting only the distinct ones).

The product of its (nonzero) digits is 144506880, while the sum is 66.

The spelling of 1378305887844 in words is "one trillion, three hundred seventy-eight billion, three hundred five million, eight hundred eighty-seven thousand, eight hundred forty-four".