6649152216 has 96 divisors (see below), whose sum is σ = 19460525040. Its totient is φ = 1887604992.

The previous prime is 6649152203. The next prime is 6649152233. The reversal of 6649152216 is 6122519466.

It is a super-2 number, since 2×6649152216² = 88422450383075421312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166626 + ... + 202638.

Almost surely, 2^6649152216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6649152216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9730262520).

6649152216 is an abundant number, since it is smaller than the sum of its proper divisors (12811372824).

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

6649152216 is a wasteful number, since it uses less digits than its factorization.

6649152216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36193 (or 36182 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 6649152216 is about 81542.3338886005. Note that the first 3 decimals coincide. The cubic root of 6649152216 is about 1880.4224393993.

The spelling of 6649152216 in words is "six billion, six hundred forty-nine million, one hundred fifty-two thousand, two hundred sixteen".