1091617093728 has 108 divisors (see below), whose sum is σ = 3611108379060. Its totient is φ = 311890594176.

The previous prime is 1091617093711. The next prime is 1091617093751. The reversal of 1091617093728 is 8273907161901.

It is a happy number.

1091617093728 is a `hidden beast` number, since 10 + 9 + 1 + 617 + 0 + 9 + 3 + 7 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38662798 + ... + 38691021.

It is an arithmetic number, because the mean of its divisors is an integer number (33436188695).

Almost surely, 2^{1091617093728} is an apocalyptic number.

1091617093728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1091617093728 is an abundant number, since it is smaller than the sum of its proper divisors (2519491285332).

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

1091617093728 is a wasteful number, since it uses less digits than its factorization.

1091617093728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77353849 (or 77353831 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 1091617093728 in words is "one trillion, ninety-one billion, six hundred seventeen million, ninety-three thousand, seven hundred twenty-eight".