1189049561280 has 448 divisors, whose sum is σ = 5075947054080. Its totient is φ = 255795314688.

The previous prime is 1189049561267. The next prime is 1189049561341. The reversal of 1189049561280 is 821659409811.

1189049561280 is a `hidden beast` number, since 1 + 1 + 8 + 90 + 495 + 61 + 2 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 449919 + ... + 1606401.

It is an arithmetic number, because the mean of its divisors is an integer number (11330238960).

Almost surely, 2^{1189049561280} is an apocalyptic number.

1189049561280 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 1189049561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2537973527040).

1189049561280 is an abundant number, since it is smaller than the sum of its proper divisors (3886897492800).

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

1189049561280 is a wasteful number, since it uses less digits than its factorization.

1189049561280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156533 (or 1156517 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

It can be divided in two parts, 1189049 and 561280, that added together give a square (1750329 = 1323²).

The spelling of 1189049561280 in words is "one trillion, one hundred eighty-nine billion, forty-nine million, five hundred sixty-one thousand, two hundred eighty".