649113188 has 24 divisors (see below), whose sum is σ = 1198360800. Its totient is φ = 306799488.

The previous prime is 649113187. The next prime is 649113191. The reversal of 649113188 is 881311946.

It is not an unprimeable number, because it can be changed into a prime (649113187) 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, 26348 + ... + 44636.

It is an arithmetic number, because the mean of its divisors is an integer number (49931700).

Almost surely, 2^649113188 is an apocalyptic number.

It is an amenable number.

649113188 is a deficient number, since it is larger than the sum of its proper divisors (549247612).

649113188 is a wasteful number, since it uses less digits than its factorization.

649113188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18779 (or 18777 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 649113188 is about 25477.6998176837. The cubic root of 649113188 is about 865.8449818266.

The spelling of 649113188 in words is "six hundred forty-nine million, one hundred thirteen thousand, one hundred eighty-eight".