161329300 has 108 divisors (see below), whose sum is σ = 392509600. Its totient is φ = 57499200.

The previous prime is 161329261. The next prime is 161329307. The reversal of 161329300 is 3923161.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161329307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 810601 + ... + 810799.

Almost surely, 2^161329300 is an apocalyptic number.

161329300 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 161329300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196254800).

161329300 is an abundant number, since it is smaller than the sum of its proper divisors (231180300).

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

161329300 is a wasteful number, since it uses less digits than its factorization.

161329300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 161329300 is about 12701.5471498554. The cubic root of 161329300 is about 544.3828268768.

The spelling of 161329300 in words is "one hundred sixty-one million, three hundred twenty-nine thousand, three hundred".