1388664441800 has 192 divisors, whose sum is σ = 3493800043200. Its totient is φ = 511513574400.

The previous prime is 1388664441751. The next prime is 1388664441817. The reversal of 1388664441800 is 81444668831.

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, 166044419 + ... + 166052781.

It is an arithmetic number, because the mean of its divisors is an integer number (18196875225).

Almost surely, 2^{1388664441800} is an apocalyptic number.

1388664441800 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 1388664441800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746900021600).

1388664441800 is an abundant number, since it is smaller than the sum of its proper divisors (2105135601400).

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

1388664441800 is a wasteful number, since it uses less digits than its factorization.

1388664441800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9616 (or 9607 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 53.

The spelling of 1388664441800 in words is "one trillion, three hundred eighty-eight billion, six hundred sixty-four million, four hundred forty-one thousand, eight hundred".