328221042065 has 16 divisors (see below), whose sum is σ = 455829588480. Its totient is φ = 222216920640.

The previous prime is 328221042049. The next prime is 328221042067. The reversal of 328221042065 is 560240122823.

It is a happy number.

It is not a de Polignac number, because 328221042065 - 2⁴ = 328221042049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (328221042067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59350046 + ... + 59355575.

It is an arithmetic number, because the mean of its divisors is an integer number (28489349280).

Almost surely, 2^328221042065 is an apocalyptic number.

328221042065 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

328221042065 is a deficient number, since it is larger than the sum of its proper divisors (127608546415).

328221042065 is a wasteful number, since it uses less digits than its factorization.

328221042065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118705712.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 328221042065 its reverse (560240122823), we get a palindrome (888461164888).

The spelling of 328221042065 in words is "three hundred twenty-eight billion, two hundred twenty-one million, forty-two thousand, sixty-five".