161944410 has 128 divisors (see below), whose sum is σ = 431827200. Its totient is φ = 38707200.

The previous prime is 161944373. The next prime is 161944411. The reversal of 161944410 is 14449161.

161944410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (161944411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1603360 + ... + 1603460.

It is an arithmetic number, because the mean of its divisors is an integer number (3373650).

Almost surely, 2^161944410 is an apocalyptic number.

161944410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161944410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215913600).

161944410 is an abundant number, since it is smaller than the sum of its proper divisors (269882790).

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

161944410 is a wasteful number, since it uses less digits than its factorization.

161944410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 161944410 is about 12725.7380925430. The cubic root of 161944410 is about 545.0738165594.

The spelling of 161944410 in words is "one hundred sixty-one million, nine hundred forty-four thousand, four hundred ten".