6649155911 has 8 divisors (see below), whose sum is σ = 6775300224. Its totient is φ = 6523803000.

The previous prime is 6649155907. The next prime is 6649155917. The reversal of 6649155911 is 1195519466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6649155911 - 2² = 6649155907 is a prime.

It is a super-2 number, since 2×6649155911² = 88422548657572479842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649155917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180875 + ... + 214508.

It is an arithmetic number, because the mean of its divisors is an integer number (846912528).

Almost surely, 2^6649155911 is an apocalyptic number.

6649155911 is a deficient number, since it is larger than the sum of its proper divisors (126144313).

6649155911 is a wasteful number, since it uses less digits than its factorization.

6649155911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395701.

The product of its digits is 291600, while the sum is 47.

The square root of 6649155911 is about 81542.3565455402. The cubic root of 6649155911 is about 1880.4227877223.

The spelling of 6649155911 in words is "six billion, six hundred forty-nine million, one hundred fifty-five thousand, nine hundred eleven".