161946517135 has 12 divisors (see below), whose sum is σ = 210434647032. Its totient is φ = 119591273568.

The previous prime is 161946517133. The next prime is 161946517177. The reversal of 161946517135 is 531715649161.

It is not a de Polignac number, because 161946517135 - 2¹ = 161946517133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161946517133) 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, 95825497 + ... + 95827186.

It is an arithmetic number, because the mean of its divisors is an integer number (17536220586).

Almost surely, 2^161946517135 is an apocalyptic number.

161946517135 is a deficient number, since it is larger than the sum of its proper divisors (48488129897).

161946517135 is a wasteful number, since it uses less digits than its factorization.

161946517135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191652714 (or 191652701 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The spelling of 161946517135 in words is "one hundred sixty-one billion, nine hundred forty-six million, five hundred seventeen thousand, one hundred thirty-five".