328541556665 has 16 divisors (see below), whose sum is σ = 450592326912. Its totient is φ = 225275114304.

The previous prime is 328541556643. The next prime is 328541556683. The reversal of 328541556665 is 566655145823.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 328541556665 - 2³⁶ = 259822079929 is a prime.

It is a super-2 number, since 2×328541556665² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 328541556665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581867 + ... + 997823.

It is an arithmetic number, because the mean of its divisors is an integer number (28162020432).

Almost surely, 2^328541556665 is an apocalyptic number.

328541556665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

328541556665 is a deficient number, since it is larger than the sum of its proper divisors (122050770247).

328541556665 is a wasteful number, since it uses less digits than its factorization.

328541556665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438536.

The product of its digits is 25920000, while the sum is 56.

The spelling of 328541556665 in words is "three hundred twenty-eight billion, five hundred forty-one million, five hundred fifty-six thousand, six hundred sixty-five".