161833849473 has 4 divisors (see below), whose sum is σ = 215778465968. Its totient is φ = 107889232980.

The previous prime is 161833849447. The next prime is 161833849487. The reversal of 161833849473 is 374948338161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161833849473 - 2⁹ = 161833848961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161833849423) 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, 26972308243 + ... + 26972308248.

It is an arithmetic number, because the mean of its divisors is an integer number (53944616492).

Almost surely, 2^161833849473 is an apocalyptic number.

It is an amenable number.

161833849473 is a deficient number, since it is larger than the sum of its proper divisors (53944616495).

161833849473 is an equidigital number, since it uses as much as digits as its factorization.

161833849473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53944616494.

The product of its digits is 10450944, while the sum is 57.

The spelling of 161833849473 in words is "one hundred sixty-one billion, eight hundred thirty-three million, eight hundred forty-nine thousand, four hundred seventy-three".