161306600 has 96 divisors (see below), whose sum is σ = 461637120. Its totient is φ = 51045120.

The previous prime is 161306573. The next prime is 161306611. The reversal of 161306600 is 6603161.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13769 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (4808720).

Almost surely, 2^161306600 is an apocalyptic number.

161306600 is a gapful number since it is divisible by the number (10) 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 161306600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230818560).

161306600 is an abundant number, since it is smaller than the sum of its proper divisors (300330520).

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

161306600 is a wasteful number, since it uses less digits than its factorization.

161306600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8899 (or 8890 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 161306600 is about 12700.6535264922. The cubic root of 161306600 is about 544.3572930364.

Adding to 161306600 its reverse (6603161), we get a palindrome (167909761).

The spelling of 161306600 in words is "one hundred sixty-one million, three hundred six thousand, six hundred".