1091795435520 has 120 divisors (see below), whose sum is σ = 3493639559424. Its totient is φ = 291145383936.

The previous prime is 1091795435443. The next prime is 1091795435527. The reversal of 1091795435520 is 255345971901.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (1091795435527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975504 + ... + 2467023.

Almost surely, 2^{1091795435520} is an apocalyptic number.

1091795435520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091795435520 is an abundant number, since it is smaller than the sum of its proper divisors (2401844123904).

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

1091795435520 is an frugal number, since it uses more digits than its factorization.

1091795435520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442563 (or 4442537 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 51.

The spelling of 1091795435520 in words is "one trillion, ninety-one billion, seven hundred ninety-five million, four hundred thirty-five thousand, five hundred twenty".