328204146721 has 24 divisors (see below), whose sum is σ = 378865327104. Its totient is φ = 281924526240.

The previous prime is 328204146703. The next prime is 328204146727. The reversal of 328204146721 is 127641402823.

It is not a de Polignac number, because 328204146721 - 2⁷ = 328204146593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328204146727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1412995 + ... + 1628791.

It is an arithmetic number, because the mean of its divisors is an integer number (15786055296).

Almost surely, 2^328204146721 is an apocalyptic number.

It is an amenable number.

328204146721 is a deficient number, since it is larger than the sum of its proper divisors (50661180383).

328204146721 is a wasteful number, since it uses less digits than its factorization.

328204146721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216229 (or 216210 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 328204146721 in words is "three hundred twenty-eight billion, two hundred four million, one hundred forty-six thousand, seven hundred twenty-one".