911990116169 has 4 divisors (see below), whose sum is σ = 994898308560. Its totient is φ = 829081923780.

The previous prime is 911990116159. The next prime is 911990116187. The reversal of 911990116169 is 961611099119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 911990116169 - 2⁸ = 911990115913 is a prime.

It is a super-2 number, since 2×911990116169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 911990116169.

It is not an unprimeable number, because it can be changed into a prime (911990116159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41454096179 + ... + 41454096200.

It is an arithmetic number, because the mean of its divisors is an integer number (248724577140).

Almost surely, 2^911990116169 is an apocalyptic number.

It is an amenable number.

911990116169 is a deficient number, since it is larger than the sum of its proper divisors (82908192391).

911990116169 is a wasteful number, since it uses less digits than its factorization.

911990116169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82908192390.

The product of its (nonzero) digits is 236196, while the sum is 53.

The spelling of 911990116169 in words is "nine hundred eleven billion, nine hundred ninety million, one hundred sixteen thousand, one hundred sixty-nine".