161361617 has 8 divisors (see below), whose sum is σ = 163192512. Its totient is φ = 159541200.

The previous prime is 161361611. The next prime is 161361619. The reversal of 161361617 is 716163161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161361617 - 2⁶ = 161361553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161361611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30692 + ... + 35562.

It is an arithmetic number, because the mean of its divisors is an integer number (20399064).

Almost surely, 2^161361617 is an apocalyptic number.

It is an amenable number.

161361617 is a deficient number, since it is larger than the sum of its proper divisors (1830895).

161361617 is a wasteful number, since it uses less digits than its factorization.

161361617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

The product of its digits is 4536, while the sum is 32.

The square root of 161361617 is about 12702.8192540081. The cubic root of 161361617 is about 544.4191741599.

The spelling of 161361617 in words is "one hundred sixty-one million, three hundred sixty-one thousand, six hundred seventeen".