328887974557 has 4 divisors (see below), whose sum is σ = 331477643776. Its totient is φ = 326298305340.

The previous prime is 328887974539. The next prime is 328887974561. The reversal of 328887974557 is 755479788823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755479788823 = 1597 ⋅473061859.

It is a cyclic number.

It is not a de Polignac number, because 328887974557 - 2¹¹ = 328887972509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328887974557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328887974057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294834419 + ... + 1294834672.

It is an arithmetic number, because the mean of its divisors is an integer number (82869410944).

Almost surely, 2^328887974557 is an apocalyptic number.

It is an amenable number.

328887974557 is a deficient number, since it is larger than the sum of its proper divisors (2589669219).

328887974557 is a wasteful number, since it uses less digits than its factorization.

328887974557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589669218.

The product of its digits is 948326400, while the sum is 73.

The spelling of 328887974557 in words is "three hundred twenty-eight billion, eight hundred eighty-seven million, nine hundred seventy-four thousand, five hundred fifty-seven".