161361717 has 16 divisors (see below), whose sum is σ = 237349440. Its totient is φ = 96694400.

The previous prime is 161361709. The next prime is 161361719. The reversal of 161361717 is 717163161.

It is not a de Polignac number, because 161361717 - 2³ = 161361709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161361719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24534 + ... + 30407.

It is an arithmetic number, because the mean of its divisors is an integer number (14834340).

Almost surely, 2^161361717 is an apocalyptic number.

It is an amenable number.

161361717 is a deficient number, since it is larger than the sum of its proper divisors (75987723).

161361717 is a wasteful number, since it uses less digits than its factorization.

161361717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55044.

The product of its digits is 5292, while the sum is 33.

The square root of 161361717 is about 12702.8231901416. The cubic root of 161361717 is about 544.4192866235.

The spelling of 161361717 in words is "one hundred sixty-one million, three hundred sixty-one thousand, seven hundred seventeen".