161716902011 has 12 divisors (see below), whose sum is σ = 189365495760. Its totient is φ = 137696504400.

The previous prime is 161716902001. The next prime is 161716902049. The reversal of 161716902011 is 110209617161.

It is not a de Polignac number, because 161716902011 - 2¹⁸ = 161716639867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161716902001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10920896 + ... + 10935693.

It is an arithmetic number, because the mean of its divisors is an integer number (15780457980).

Almost surely, 2^161716902011 is an apocalyptic number.

161716902011 is a deficient number, since it is larger than the sum of its proper divisors (27648593749).

161716902011 is a wasteful number, since it uses less digits than its factorization.

161716902011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21856754 (or 21856747 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 161716902011 in words is "one hundred sixty-one billion, seven hundred sixteen million, nine hundred two thousand, eleven".