161485800 has 96 divisors (see below), whose sum is σ = 572136000. Its totient is φ = 36910080.

The previous prime is 161485781. The next prime is 161485801. The reversal of 161485800 is 8584161.

It is not an unprimeable number, because it can be changed into a prime (161485801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15025 + ... + 23424.

It is an arithmetic number, because the mean of its divisors is an integer number (5959750).

Almost surely, 2^161485800 is an apocalyptic number.

161485800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161485800 is an abundant number, since it is smaller than the sum of its proper divisors (410650200).

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

161485800 is a wasteful number, since it uses less digits than its factorization.

161485800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38475 (or 38466 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 161485800 is about 12707.7063233300. The cubic root of 161485800 is about 544.5587990007.

The spelling of 161485800 in words is "one hundred sixty-one million, four hundred eighty-five thousand, eight hundred".