161783133853 has 16 divisors (see below), whose sum is σ = 177990613632. Its totient is φ = 147041426400.

The previous prime is 161783133851. The next prime is 161783133859. The reversal of 161783133853 is 358331387161.

It is not a de Polignac number, because 161783133853 - 2¹ = 161783133851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161783133797 and 161783133806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161783133851) 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, 7046833 + ... + 7069753.

It is an arithmetic number, because the mean of its divisors is an integer number (11124413352).

Almost surely, 2^161783133853 is an apocalyptic number.

It is an amenable number.

161783133853 is a deficient number, since it is larger than the sum of its proper divisors (16207479779).

161783133853 is an equidigital number, since it uses as much as digits as its factorization.

161783133853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28257 (or 28235 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The spelling of 161783133853 in words is "one hundred sixty-one billion, seven hundred eighty-three million, one hundred thirty-three thousand, eight hundred fifty-three".