911990116171 has 4 divisors (see below), whose sum is σ = 911994138000. Its totient is φ = 911986094344.

The previous prime is 911990116159. The next prime is 911990116187. The reversal of 911990116171 is 171611099119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171611099119 = 127 ⋅1351268497.

It is a cyclic number.

It is not a de Polignac number, because 911990116171 - 2¹⁷ = 911989985099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (911990116111) 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, 1649071 + ... + 2131528.

It is an arithmetic number, because the mean of its divisors is an integer number (227998534500).

Almost surely, 2^911990116171 is an apocalyptic number.

911990116171 is a deficient number, since it is larger than the sum of its proper divisors (4021829).

911990116171 is a wasteful number, since it uses less digits than its factorization.

911990116171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021828.

The product of its (nonzero) digits is 30618, while the sum is 46.

The spelling of 911990116171 in words is "nine hundred eleven billion, nine hundred ninety million, one hundred sixteen thousand, one hundred seventy-one".