1091353105920 has 640 divisors, whose sum is σ = 4539000913920. Its totient is φ = 216912199680.

The previous prime is 1091353105919. The next prime is 1091353105933. The reversal of 1091353105920 is 295013531901.

1091353105920 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

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, 13561161 + ... + 13641399.

It is an arithmetic number, because the mean of its divisors is an integer number (7092188928).

Almost surely, 2^{1091353105920} is an apocalyptic number.

1091353105920 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 1091353105920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2269500456960).

1091353105920 is an abundant number, since it is smaller than the sum of its proper divisors (3447647808000).

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

1091353105920 is a wasteful number, since it uses less digits than its factorization.

1091353105920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80306 (or 80290 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 39.

The spelling of 1091353105920 in words is "one trillion, ninety-one billion, three hundred fifty-three million, one hundred five thousand, nine hundred twenty".