6445871032384 has 63 divisors (see below), whose sum is σ = 14879684197773. Its totient is φ = 2762455223808.

The previous prime is 6445871032357. The next prime is 6445871032397. The reversal of 6445871032384 is 4832301785446.

The square root of 6445871032384 is 2538872.

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

It can be written as a sum of positive squares in only one way, i.e., 4503393294400 + 1942477737984 = 2122120^2 + 1393728^2 .

It is a super-2 number, since 2×6445871032384² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 142154164 + ... + 142199500.

Almost surely, 2^{6445871032384} is an apocalyptic number.

6445871032384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

6445871032384 is the 2538872-nd square number.

It is an amenable number.

6445871032384 is an abundant number, since it is smaller than the sum of its proper divisors (8433813165389).

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

6445871032384 is an frugal number, since it uses more digits than its factorization.

6445871032384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90700 (or 45346 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 6445871032384 in words is "six trillion, four hundred forty-five billion, eight hundred seventy-one million, thirty-two thousand, three hundred eighty-four".