328921505129823 has 4 divisors (see below), whose sum is σ = 438562006839768. Its totient is φ = 219281003419880.

The previous prime is 328921505129801. The next prime is 328921505129831.

It is a happy number.

328921505129823 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328921505129823 - 2¹² = 328921505125727 is a prime.

It is a super-2 number, since 2×328921505129823² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328921505129423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54820250854968 + ... + 54820250854973.

It is an arithmetic number, because the mean of its divisors is an integer number (109640501709942).

Almost surely, 2^{328921505129823} is an apocalyptic number.

328921505129823 is a deficient number, since it is larger than the sum of its proper divisors (109640501709945).

328921505129823 is a wasteful number, since it uses less digits than its factorization.

328921505129823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109640501709944.

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 328921505129823 in words is "three hundred twenty-eight trillion, nine hundred twenty-one billion, five hundred five million, one hundred twenty-nine thousand, eight hundred twenty-three".