161109873336 has 32 divisors (see below), whose sum is σ = 402787756800. Its totient is φ = 53701548000.

The previous prime is 161109873299. The next prime is 161109873371. The reversal of 161109873336 is 633378901161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800961 + ... + 981711.

It is an arithmetic number, because the mean of its divisors is an integer number (12587117400).

Almost surely, 2^161109873336 is an apocalyptic number.

It is an amenable number.

161109873336 is an abundant number, since it is smaller than the sum of its proper divisors (241677883464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161109873336 is a wasteful number, since it uses less digits than its factorization.

161109873336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217899 (or 217895 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 161109873336 in words is "one hundred sixty-one billion, one hundred nine million, eight hundred seventy-three thousand, three hundred thirty-six".