649741818 has 32 divisors (see below), whose sum is σ = 1447787520. Its totient is φ = 192701360.

The previous prime is 649741783. The next prime is 649741823. The reversal of 649741818 is 818147946.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 101628 + ... + 107831.

It is an arithmetic number, because the mean of its divisors is an integer number (45243360).

Almost surely, 2^649741818 is an apocalyptic number.

649741818 is an abundant number, since it is smaller than the sum of its proper divisors (798045702).

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

649741818 is a wasteful number, since it uses less digits than its factorization.

649741818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209522.

The product of its digits is 387072, while the sum is 48.

The square root of 649741818 is about 25490.0336994677. The cubic root of 649741818 is about 866.1243992064.

The spelling of 649741818 in words is "six hundred forty-nine million, seven hundred forty-one thousand, eight hundred eighteen".