649069785727 has 16 divisors (see below), whose sum is σ = 765679329792. Its totient is φ = 543537781120.

The previous prime is 649069785719. The next prime is 649069785769. The reversal of 649069785727 is 727587960946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 649069785727 - 2³ = 649069785719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649069785797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36916333 + ... + 36933910.

It is an arithmetic number, because the mean of its divisors is an integer number (47854958112).

Almost surely, 2^649069785727 is an apocalyptic number.

649069785727 is a deficient number, since it is larger than the sum of its proper divisors (116609544065).

649069785727 is a wasteful number, since it uses less digits than its factorization.

649069785727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73850318.

The product of its (nonzero) digits is 320060160, while the sum is 70.

The spelling of 649069785727 in words is "six hundred forty-nine billion, sixty-nine million, seven hundred eighty-five thousand, seven hundred twenty-seven".