161326625 has 16 divisors (see below), whose sum is σ = 211935360. Its totient is φ = 122266800.

The previous prime is 161326619. The next prime is 161326657. The reversal of 161326625 is 526623161.

It is not a de Polignac number, because 161326625 - 2⁴ = 161326609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161326591 and 161326600.

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 15 ways as a sum of consecutive naturals, for example, 31589 + ... + 36338.

It is an arithmetic number, because the mean of its divisors is an integer number (13245960).

Almost surely, 2^161326625 is an apocalyptic number.

It is an amenable number.

161326625 is a deficient number, since it is larger than the sum of its proper divisors (50608735).

161326625 is an equidigital number, since it uses as much as digits as its factorization.

161326625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67961 (or 67951 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 161326625 is about 12701.4418472865. The cubic root of 161326625 is about 544.3798180575.

Adding to 161326625 its reverse (526623161), we get a palindrome (687949786).

The spelling of 161326625 in words is "one hundred sixty-one million, three hundred twenty-six thousand, six hundred twenty-five".