1021316664 has 64 divisors (see below), whose sum is σ = 2646028800. Its totient is φ = 328116096.

The previous prime is 1021316651. The next prime is 1021316687. The reversal of 1021316664 is 4666131201.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571917 + ... + 573699.

It is an arithmetic number, because the mean of its divisors is an integer number (41344200).

Almost surely, 2^1021316664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021316664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323014400).

1021316664 is an abundant number, since it is smaller than the sum of its proper divisors (1624712136).

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

1021316664 is a wasteful number, since it uses less digits than its factorization.

1021316664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 2640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1021316664 is about 31958.0453720186. The cubic root of 1021316664 is about 1007.0556553126.

Adding to 1021316664 its reverse (4666131201), we get a palindrome (5687447865).

The spelling of 1021316664 in words is "one billion, twenty-one million, three hundred sixteen thousand, six hundred sixty-four".