161832503243 has 4 divisors (see below), whose sum is σ = 166206354720. Its totient is φ = 157458651768.

The previous prime is 161832503219. The next prime is 161832503251. The reversal of 161832503243 is 342305238161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161832503243 - 2⁸ = 161832502987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161832503197 and 161832503206.

It is not an unprimeable number, because it can be changed into a prime (161832503543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2186925683 + ... + 2186925756.

It is an arithmetic number, because the mean of its divisors is an integer number (41551588680).

Almost surely, 2^161832503243 is an apocalyptic number.

161832503243 is a deficient number, since it is larger than the sum of its proper divisors (4373851477).

161832503243 is an equidigital number, since it uses as much as digits as its factorization.

161832503243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373851476.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 161832503243 in words is "one hundred sixty-one billion, eight hundred thirty-two million, five hundred three thousand, two hundred forty-three".