161411380 has 24 divisors (see below), whose sum is σ = 365038632. Its totient is φ = 59597952.

The previous prime is 161411377. The next prime is 161411399. The reversal of 161411380 is 83114161.

It is a happy number.

161411380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33223696 + 128187684 = 5764^2 + 11322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310147 + ... + 310666.

It is an arithmetic number, because the mean of its divisors is an integer number (15209943).

Almost surely, 2^161411380 is an apocalyptic number.

161411380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161411380 is an abundant number, since it is smaller than the sum of its proper divisors (203627252).

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

161411380 is a wasteful number, since it uses less digits than its factorization.

161411380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620835 (or 620833 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 161411380 is about 12704.7778414264. Note that the first 3 decimals coincide. The cubic root of 161411380 is about 544.4751336612.

The spelling of 161411380 in words is "one hundred sixty-one million, four hundred eleven thousand, three hundred eighty".