649654126 has 16 divisors (see below), whose sum is σ = 1064026368. Its totient is φ = 295031800.

The previous prime is 649654123. The next prime is 649654127. The reversal of 649654126 is 621456946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649654123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12891 + ... + 38281.

It is an arithmetic number, because the mean of its divisors is an integer number (66501648).

Almost surely, 2^649654126 is an apocalyptic number.

649654126 is a deficient number, since it is larger than the sum of its proper divisors (414372242).

649654126 is a wasteful number, since it uses less digits than its factorization.

649654126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26567.

The product of its digits is 311040, while the sum is 43.

The square root of 649654126 is about 25488.3135181597. The cubic root of 649654126 is about 866.0854321398.

The spelling of 649654126 in words is "six hundred forty-nine million, six hundred fifty-four thousand, one hundred twenty-six".