161164100 has 36 divisors (see below), whose sum is σ = 353144064. Its totient is φ = 63835680.

The previous prime is 161164079. The next prime is 161164123. The reversal of 161164100 is 1461161.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2477 + ... + 18123.

Almost surely, 2^161164100 is an apocalyptic number.

161164100 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 161164100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176572032).

161164100 is an abundant number, since it is smaller than the sum of its proper divisors (191979964).

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

161164100 is a wasteful number, since it uses less digits than its factorization.

161164100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15764 (or 15757 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 161164100 is about 12695.0423394331. The cubic root of 161164100 is about 544.1969487648.

The spelling of 161164100 in words is "one hundred sixty-one million, one hundred sixty-four thousand, one hundred".