1189845566944 has 72 divisors (see below), whose sum is σ = 2441013448608. Its totient is φ = 570572782080.

The previous prime is 1189845566927. The next prime is 1189845566947. The reversal of 1189845566944 is 4496655489811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189845566947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4436809 + ... + 4697335.

It is an arithmetic number, because the mean of its divisors is an integer number (33902964564).

Almost surely, 2^{1189845566944} 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 1189845566944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220506724304).

1189845566944 is an abundant number, since it is smaller than the sum of its proper divisors (1251167881664).

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

1189845566944 is an equidigital number, since it uses as much as digits as its factorization.

1189845566944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260696 (or 260629 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 70.

The spelling of 1189845566944 in words is "one trillion, one hundred eighty-nine billion, eight hundred forty-five million, five hundred sixty-six thousand, nine hundred forty-four".