161311600 has 60 divisors (see below), whose sum is σ = 400083520. Its totient is φ = 62438400.

The previous prime is 161311583. The next prime is 161311603. The reversal of 161311600 is 6113161.

161311600 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161311603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5896 + ... + 18904.

Almost surely, 2^161311600 is an apocalyptic number.

161311600 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 161311600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200041760).

161311600 is an abundant number, since it is smaller than the sum of its proper divisors (238771920).

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

161311600 is a wasteful number, since it uses less digits than its factorization.

161311600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13058 (or 13047 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 161311600 is about 12700.8503652315. The cubic root of 161311600 is about 544.3629174360.

Adding to 161311600 its reverse (6113161), we get a palindrome (167424761).

The spelling of 161311600 in words is "one hundred sixty-one million, three hundred eleven thousand, six hundred".