161803541017 has 8 divisors (see below), whose sum is σ = 170342070560. Its totient is φ = 153267266880.

The previous prime is 161803540981. The next prime is 161803541047. The reversal of 161803541017 is 710145308161.

It is a happy number.

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 161803541017 - 2¹⁵ = 161803508249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161803541047) 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, 415584 + ... + 704497.

It is an arithmetic number, because the mean of its divisors is an integer number (21292758820).

Almost surely, 2^161803541017 is an apocalyptic number.

It is an amenable number.

161803541017 is a deficient number, since it is larger than the sum of its proper divisors (8538529543).

161803541017 is a wasteful number, since it uses less digits than its factorization.

161803541017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127703.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 161803541017 its reverse (710145308161), we get a palindrome (871948849178).

The spelling of 161803541017 in words is "one hundred sixty-one billion, eight hundred three million, five hundred forty-one thousand, seventeen".