921966393264 has 40 divisors (see below), whose sum is σ = 2721996019200. Its totient is φ = 263418969408.

The previous prime is 921966393239. The next prime is 921966393277. The reversal of 921966393264 is 462393669129.

It is a junction number, because it is equal to n+sod(n) for n = 921966393198 and 921966393207.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1371973464 + ... + 1371974135.

It is an arithmetic number, because the mean of its divisors is an integer number (68049900480).

Almost surely, 2^921966393264 is an apocalyptic number.

It is an amenable number.

921966393264 is an abundant number, since it is smaller than the sum of its proper divisors (1800029625936).

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

921966393264 is a wasteful number, since it uses less digits than its factorization.

921966393264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743947617 (or 2743947611 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 60.

The spelling of 921966393264 in words is "nine hundred twenty-one billion, nine hundred sixty-six million, three hundred ninety-three thousand, two hundred sixty-four".