649090911 has 16 divisors (see below), whose sum is σ = 990489600. Its totient is φ = 370384608.

The previous prime is 649090907. The next prime is 649090921. The reversal of 649090911 is 119090946.

It is not a de Polignac number, because 649090911 - 2² = 649090907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649090911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649090921) 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 15 ways as a sum of consecutive naturals, for example, 6396 + ... + 36593.

It is an arithmetic number, because the mean of its divisors is an integer number (61905600).

Almost surely, 2^649090911 is an apocalyptic number.

649090911 is a deficient number, since it is larger than the sum of its proper divisors (341398689).

649090911 is a wasteful number, since it uses less digits than its factorization.

649090911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43718.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 649090911 is about 25477.2626276843. The cubic root of 649090911 is about 865.8350766977.

The spelling of 649090911 in words is "six hundred forty-nine million, ninety thousand, nine hundred eleven".