6468621784 has 16 divisors (see below), whose sum is σ = 12165313320. Its totient is φ = 3224538240.

The previous prime is 6468621773. The next prime is 6468621787. The reversal of 6468621784 is 4871268646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6468621787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218769 + ... + 1224064.

Almost surely, 2^6468621784 is an apocalyptic number.

It is an amenable number.

6468621784 is a deficient number, since it is larger than the sum of its proper divisors (5696691536).

6468621784 is a wasteful number, since it uses less digits than its factorization.

6468621784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443170 (or 2443166 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 52.

The square root of 6468621784 is about 80427.7426265340. The cubic root of 6468621784 is about 1863.2476678952.

The spelling of 6468621784 in words is "six billion, four hundred sixty-eight million, six hundred twenty-one thousand, seven hundred eighty-four".