6649526389 has 8 divisors (see below), whose sum is σ = 7569421632. Its totient is φ = 5782196640.

The previous prime is 6649526363. The next prime is 6649526413. The reversal of 6649526389 is 9836259466.

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

It is not a de Polignac number, because 6649526389 - 2¹⁵ = 6649493621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649526339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13141104 + ... + 13141609.

It is an arithmetic number, because the mean of its divisors is an integer number (946177704).

Almost surely, 2^6649526389 is an apocalyptic number.

It is an amenable number.

6649526389 is a deficient number, since it is larger than the sum of its proper divisors (919895243).

6649526389 is a wasteful number, since it uses less digits than its factorization.

6649526389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282747.

The product of its digits is 16796160, while the sum is 58.

The square root of 6649526389 is about 81544.6282044378. The cubic root of 6649526389 is about 1880.4577115705.

The spelling of 6649526389 in words is "six billion, six hundred forty-nine million, five hundred twenty-six thousand, three hundred eighty-nine".