161650071201 has 32 divisors (see below), whose sum is σ = 220772012032. Its totient is φ = 105179886720.

The previous prime is 161650071181. The next prime is 161650071227. The reversal of 161650071201 is 102170056161.

It is not a de Polignac number, because 161650071201 - 2⁶ = 161650071137 is a prime.

It is a super-2 number, since 2×161650071201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161650071601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60248406 + ... + 60251088.

It is an arithmetic number, because the mean of its divisors is an integer number (6899125376).

Almost surely, 2^161650071201 is an apocalyptic number.

It is an amenable number.

161650071201 is a deficient number, since it is larger than the sum of its proper divisors (59121940831).

161650071201 is a wasteful number, since it uses less digits than its factorization.

161650071201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533.

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 161650071201 in words is "one hundred sixty-one billion, six hundred fifty million, seventy-one thousand, two hundred one".