328981793550 has 48 divisors (see below), whose sum is σ = 816547908720. Its totient is φ = 87656106240.

The previous prime is 328981793509. The next prime is 328981793557. The reversal of 328981793550 is 55397189823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328981793557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722095 + ... + 1085994.

It is an arithmetic number, because the mean of its divisors is an integer number (17011414765).

Almost surely, 2^328981793550 is an apocalyptic number.

328981793550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

328981793550 is an abundant number, since it is smaller than the sum of its proper divisors (487566115170).

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

328981793550 is a wasteful number, since it uses less digits than its factorization.

328981793550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809317 (or 1809312 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 328981793550 in words is "three hundred twenty-eight billion, nine hundred eighty-one million, seven hundred ninety-three thousand, five hundred fifty".