161623326 has 32 divisors (see below), whose sum is σ = 339723648. Its totient is φ = 51196320.

The previous prime is 161623321. The next prime is 161623333. The reversal of 161623326 is 623326161.

It is a super-2 number, since 2×161623326² = 52244199014604552, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 161623293 and 161623302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161623321) by changing a digit.

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, 1081 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (10616364).

Almost surely, 2^161623326 is an apocalyptic number.

161623326 is an abundant number, since it is smaller than the sum of its proper divisors (178100322).

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

161623326 is a wasteful number, since it uses less digits than its factorization.

161623326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17016.

The product of its digits is 7776, while the sum is 30.

The square root of 161623326 is about 12713.1162977454. The cubic root of 161623326 is about 544.7133425037.

Adding to 161623326 its reverse (623326161), we get a palindrome (784949487).

It can be divided in two parts, 1616 and 23326, that added together give a palindrome (24942).

The spelling of 161623326 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred twenty-six".