6649042416 has 20 divisors (see below), whose sum is σ = 17176693032. Its totient is φ = 2216347456.

The previous prime is 6649042391. The next prime is 6649042427. The reversal of 6649042416 is 6142409466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69260811 + ... + 69260906.

Almost surely, 2^6649042416 is an apocalyptic number.

It is an amenable number.

6649042416 is an abundant number, since it is smaller than the sum of its proper divisors (10527650616).

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

6649042416 is a wasteful number, since it uses less digits than its factorization.

6649042416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138521728 (or 138521722 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 6649042416 is about 81541.6606159085. The cubic root of 6649042416 is about 1880.4120886300.

The spelling of 6649042416 in words is "six billion, six hundred forty-nine million, forty-two thousand, four hundred sixteen".