6649368545 has 8 divisors (see below), whose sum is σ = 8017059840. Its totient is φ = 5294283120.

The previous prime is 6649368487. The next prime is 6649368547. The reversal of 6649368545 is 5458639466.

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

It is a de Polignac number, because none of the positive numbers 2^k-6649368545 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6649368547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3150305 + ... + 3152414.

It is an arithmetic number, because the mean of its divisors is an integer number (1002132480).

Almost surely, 2^6649368545 is an apocalyptic number.

It is an amenable number.

6649368545 is a deficient number, since it is larger than the sum of its proper divisors (1367691295).

6649368545 is a wasteful number, since it uses less digits than its factorization.

6649368545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6302935.

The product of its digits is 18662400, while the sum is 56.

The square root of 6649368545 is about 81543.6603605700. The cubic root of 6649368545 is about 1880.4428322494.

The spelling of 6649368545 in words is "six billion, six hundred forty-nine million, three hundred sixty-eight thousand, five hundred forty-five".