328172335181 has 2 divisors, whose sum is σ = 328172335182. Its totient is φ = 328172335180.

The previous prime is 328172335109. The next prime is 328172335229. The reversal of 328172335181 is 181533271823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168400253956 + 159772081225 = 410366^2 + 399715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328172335181 is a prime.

It is a super-2 number, since 2×328172335181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328172335481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164086167590 + 164086167591.

It is an arithmetic number, because the mean of its divisors is an integer number (164086167591).

Almost surely, 2^328172335181 is an apocalyptic number.

It is an amenable number.

328172335181 is a deficient number, since it is larger than the sum of its proper divisors (1).

328172335181 is an equidigital number, since it uses as much as digits as its factorization.

328172335181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The spelling of 328172335181 in words is "three hundred twenty-eight billion, one hundred seventy-two million, three hundred thirty-five thousand, one hundred eighty-one".