8520996266640 has 1280 divisors, whose sum is σ = 34911735505920. Its totient is φ = 1883160576000.

The previous prime is 8520996266621. The next prime is 8520996266663. The reversal of 8520996266640 is 466626990258.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 9671959000 + ... + 9671959880.

It is an arithmetic number, because the mean of its divisors is an integer number (27274793364).

Almost surely, 2^{8520996266640} is an apocalyptic number.

8520996266640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8520996266640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17455867752960).

8520996266640 is an abundant number, since it is smaller than the sum of its proper divisors (26390739239280).

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

8520996266640 is a wasteful number, since it uses less digits than its factorization.

8520996266640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 8520996266640 in words is "eight trillion, five hundred twenty billion, nine hundred ninety-six million, two hundred sixty-six thousand, six hundred forty".