161353332503 has 8 divisors (see below), whose sum is σ = 176028174336. Its totient is φ = 146679550200.

The previous prime is 161353332473. The next prime is 161353332529. The reversal of 161353332503 is 305233353161.

161353332503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161353332503 - 2¹⁶ = 161353266967 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 (161353337503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72200 + ... + 572642.

It is an arithmetic number, because the mean of its divisors is an integer number (22003521792).

Almost surely, 2^161353332503 is an apocalyptic number.

161353332503 is a deficient number, since it is larger than the sum of its proper divisors (14674841833).

161353332503 is a wasteful number, since it uses less digits than its factorization.

161353332503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529765.

The product of its (nonzero) digits is 72900, while the sum is 35.

Adding to 161353332503 its reverse (305233353161), we get a palindrome (466586685664).

The spelling of 161353332503 in words is "one hundred sixty-one billion, three hundred fifty-three million, three hundred thirty-two thousand, five hundred three".