161441361 has 6 divisors (see below), whose sum is σ = 233193090. Its totient is φ = 107627568.

The previous prime is 161441359. The next prime is 161441369. The reversal of 161441361 is 163144161.

161441361 is a `hidden beast` number, since 1 + 614 + 41 + 3 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 161417025 + 24336 = 12705^2 + 156^2 .

It is not a de Polignac number, because 161441361 - 2¹ = 161441359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161441369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8968956 + ... + 8968973.

It is an arithmetic number, because the mean of its divisors is an integer number (38865515).

Almost surely, 2^161441361 is an apocalyptic number.

It is an amenable number.

161441361 is a deficient number, since it is larger than the sum of its proper divisors (71751729).

161441361 is a wasteful number, since it uses less digits than its factorization.

161441361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937935 (or 17937932 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 161441361 is about 12705.9576970805. The cubic root of 161441361 is about 544.5088423510.

The spelling of 161441361 in words is "one hundred sixty-one million, four hundred forty-one thousand, three hundred sixty-one".