816764720884 has 12 divisors (see below), whose sum is σ = 1633529441824. Its totient is φ = 350042023224.

The previous prime is 816764720881. The next prime is 816764720987. The reversal of 816764720884 is 488027467618.

816764720884 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816764720881) 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 3 ways as a sum of consecutive naturals, for example, 14585084274 + ... + 14585084329.

Almost surely, 2^816764720884 is an apocalyptic number.

It is an amenable number.

816764720884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

816764720884 is a wasteful number, since it uses less digits than its factorization.

816764720884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29170168614 (or 29170168612 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 61.

The spelling of 816764720884 in words is "eight hundred sixteen billion, seven hundred sixty-four million, seven hundred twenty thousand, eight hundred eighty-four".