10991838993409 has 8 divisors (see below), whose sum is σ = 11019843659232. Its totient is φ = 10963837281600.

The previous prime is 10991838993341. The next prime is 10991838993413. The reversal of 10991838993409 is 90439983819901.

10991838993409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10991838993409 - 2¹¹ = 10991838991361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10991838993419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6811102 + ... + 8268904.

It is an arithmetic number, because the mean of its divisors is an integer number (1377480457404).

Almost surely, 2^{10991838993409} is an apocalyptic number.

It is an amenable number.

10991838993409 is a deficient number, since it is larger than the sum of its proper divisors (28004665823).

10991838993409 is a wasteful number, since it uses less digits than its factorization.

10991838993409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477007.

The product of its (nonzero) digits is 136048896, while the sum is 73.

The spelling of 10991838993409 in words is "ten trillion, nine hundred ninety-one billion, eight hundred thirty-eight million, nine hundred ninety-three thousand, four hundred nine".