921556782316 has 12 divisors (see below), whose sum is σ = 1619828883288. Its totient is φ = 458748529952.

The previous prime is 921556782271. The next prime is 921556782323. The reversal of 921556782316 is 613287655129.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507464281 + ... + 507466096.

It is an arithmetic number, because the mean of its divisors is an integer number (134985740274).

Almost surely, 2^921556782316 is an apocalyptic number.

It is an amenable number.

921556782316 is a deficient number, since it is larger than the sum of its proper divisors (698272100972).

921556782316 is a wasteful number, since it uses less digits than its factorization.

921556782316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014930608 (or 1014930606 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 55.

The spelling of 921556782316 in words is "nine hundred twenty-one billion, five hundred fifty-six million, seven hundred eighty-two thousand, three hundred sixteen".