328823777647 has 16 divisors (see below), whose sum is σ = 347031301120. Its totient is φ = 310707381600.

The previous prime is 328823777629. The next prime is 328823777677. The reversal of 328823777647 is 746777328823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328823777647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328823777677) 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, 12227338 + ... + 12254200.

It is an arithmetic number, because the mean of its divisors is an integer number (21689456320).

Almost surely, 2^328823777647 is an apocalyptic number.

328823777647 is a deficient number, since it is larger than the sum of its proper divisors (18207523473).

328823777647 is a wasteful number, since it uses less digits than its factorization.

328823777647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28534.

The product of its digits is 132765696, while the sum is 64.

The spelling of 328823777647 in words is "three hundred twenty-eight billion, eight hundred twenty-three million, seven hundred seventy-seven thousand, six hundred forty-seven".