8450021099664 has 75 divisors (see below), whose sum is σ = 24457115497507. Its totient is φ = 2816638817184.

The previous prime is 8450021099633. The next prime is 8450021099693. The reversal of 8450021099664 is 4669901200548.

The square root of 8450021099664 is 2906892.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8450021099664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 104607739 + ... + 104688485.

Almost surely, 2^{8450021099664} is an apocalyptic number.

8450021099664 is the 2906892-nd square number.

It is an amenable number.

8450021099664 is an abundant number, since it is smaller than the sum of its proper divisors (16007094397843).

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

8450021099664 is an frugal number, since it uses more digits than its factorization.

8450021099664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161514 (or 80752 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 8450021099664 in words is "eight trillion, four hundred fifty billion, twenty-one million, ninety-nine thousand, six hundred sixty-four".