1091712435408 has 320 divisors, whose sum is σ = 3817501696000. Its totient is φ = 291759376896.

The previous prime is 1091712435391. The next prime is 1091712435419. The reversal of 1091712435408 is 8045342171901.

1091712435408 is a `hidden beast` number, since 1 + 0 + 9 + 171 + 2 + 435 + 40 + 8 = 666.

1091712435408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4418766 + ... + 4659282.

It is an arithmetic number, because the mean of its divisors is an integer number (11929692800).

Almost surely, 2^{1091712435408} is an apocalyptic number.

1091712435408 is a gapful number since it is divisible by the number (18) 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 1091712435408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908750848000).

1091712435408 is an abundant number, since it is smaller than the sum of its proper divisors (2725789260592).

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

1091712435408 is a wasteful number, since it uses less digits than its factorization.

1091712435408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240639 (or 240627 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1091712435408 in words is "one trillion, ninety-one billion, seven hundred twelve million, four hundred thirty-five thousand, four hundred eight".