6444891775824 has 40 divisors (see below), whose sum is σ = 17186378072832. Its totient is φ = 2078997346560.

The previous prime is 6444891775787. The next prime is 6444891775841. The reversal of 6444891775824 is 4285771984446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165620749 + ... + 2165623724.

Almost surely, 2^{6444891775824} is an apocalyptic number.

It is an amenable number.

6444891775824 is an abundant number, since it is smaller than the sum of its proper divisors (10741486297008).

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

6444891775824 is a wasteful number, since it uses less digits than its factorization.

6444891775824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331244515 (or 4331244509 counting only the distinct ones).

The product of its digits is 433520640, while the sum is 69.

The spelling of 6444891775824 in words is "six trillion, four hundred forty-four billion, eight hundred ninety-one million, seven hundred seventy-five thousand, eight hundred twenty-four".