6448442520 has 64 divisors (see below), whose sum is σ = 20833434720. Its totient is φ = 1587308544.

The previous prime is 6448442513. The next prime is 6448442549. The reversal of 6448442520 is 252448446.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2065249 + ... + 2068368.

Almost surely, 2^6448442520 is an apocalyptic number.

6448442520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6448442520 is an abundant number, since it is smaller than the sum of its proper divisors (14384992200).

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

6448442520 is a wasteful number, since it uses less digits than its factorization.

6448442520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133644 (or 4133640 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 39.

The square root of 6448442520 is about 80302.1949886801. The cubic root of 6448442520 is about 1861.3081443936.

The spelling of 6448442520 in words is "six billion, four hundred forty-eight million, four hundred forty-two thousand, five hundred twenty".