161334404 has 48 divisors (see below), whose sum is σ = 356299776. Its totient is φ = 62090400.

The previous prime is 161334401. The next prime is 161334419. The reversal of 161334404 is 404433161.

It is not an unprimeable number, because it can be changed into a prime (161334401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22409 + ... + 28719.

It is an arithmetic number, because the mean of its divisors is an integer number (7422912).

Almost surely, 2^161334404 is an apocalyptic number.

161334404 is a gapful number since it is divisible by the number (14) 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 161334404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178149888).

161334404 is an abundant number, since it is smaller than the sum of its proper divisors (194965372).

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

161334404 is a wasteful number, since it uses less digits than its factorization.

161334404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416 (or 6414 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 161334404 is about 12701.7480686715. The cubic root of 161334404 is about 544.3885677241.

Adding to 161334404 its reverse (404433161), we get a palindrome (565767565).

The spelling of 161334404 in words is "one hundred sixty-one million, three hundred thirty-four thousand, four hundred four".