1445389920000 has 1800 divisors, whose sum is σ = 6068315942304. Its totient is φ = 339406848000.

The previous prime is 1445389919969. The next prime is 1445389920047. The reversal of 1445389920000 is 299835441.

1445389920000 is a `hidden beast` number, since 1 + 4 + 4 + 538 + 99 + 20 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 3875039814 + ... + 3875040186.

Almost surely, 2^{1445389920000} is an apocalyptic number.

1445389920000 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 1445389920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3034157971152).

1445389920000 is an abundant number, since it is smaller than the sum of its proper divisors (4622926022304).

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

1445389920000 is an equidigital number, since it uses as much as digits as its factorization.

1445389920000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 1445389920000 in words is "one trillion, four hundred forty-five billion, three hundred eighty-nine million, nine hundred twenty thousand".