161203580176 has 160 divisors (see below), whose sum is σ = 345539312640. Its totient is φ = 72598192128.

The previous prime is 161203580173. The next prime is 161203580177. The reversal of 161203580176 is 671085302161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161203580173) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 279382000 + ... + 279382576.

It is an arithmetic number, because the mean of its divisors is an integer number (2159620704).

Almost surely, 2^161203580176 is an apocalyptic number.

161203580176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161203580176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172769656320).

161203580176 is an abundant number, since it is smaller than the sum of its proper divisors (184335732464).

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

161203580176 is a wasteful number, since it uses less digits than its factorization.

161203580176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 161203580176 in words is "one hundred sixty-one billion, two hundred three million, five hundred eighty thousand, one hundred seventy-six".