2820646864828 has 48 divisors (see below), whose sum is σ = 5334088107040. Its totient is φ = 1297368244224.

The previous prime is 2820646864823. The next prime is 2820646864883. The reversal of 2820646864828 is 8284686460282.

It is a self number, because there is not a number n which added to its sum of digits gives 2820646864828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820646864823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119542600 + ... + 119566192.

Almost surely, 2^{2820646864828} is an apocalyptic number.

It is an amenable number.

2820646864828 is a deficient number, since it is larger than the sum of its proper divisors (2513441242212).

2820646864828 is a wasteful number, since it uses less digits than its factorization.

2820646864828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31406 (or 31404 counting only the distinct ones).

The product of its (nonzero) digits is 113246208, while the sum is 64.

The spelling of 2820646864828 in words is "two trillion, eight hundred twenty billion, six hundred forty-six million, eight hundred sixty-four thousand, eight hundred twenty-eight".