1091191150080 has 480 divisors, whose sum is σ = 3963304144800. Its totient is φ = 287700221952.

The previous prime is 1091191150067. The next prime is 1091191150099. The reversal of 1091191150080 is 800511911901.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 55355266 + ... + 55374974.

It is an arithmetic number, because the mean of its divisors is an integer number (8256883635).

Almost surely, 2^{1091191150080} is an apocalyptic number.

1091191150080 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 1091191150080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1981652072400).

1091191150080 is an abundant number, since it is smaller than the sum of its proper divisors (2872112994720).

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

1091191150080 is an frugal number, since it uses more digits than its factorization.

1091191150080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19836 (or 19808 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 36.

The spelling of 1091191150080 in words is "one trillion, ninety-one billion, one hundred ninety-one million, one hundred fifty thousand, eighty".