649198765795 has 16 divisors (see below), whose sum is σ = 795154358880. Its totient is φ = 508724195584.

The previous prime is 649198765783. The next prime is 649198765823. The reversal of 649198765795 is 597567891946.

It is a cyclic number.

It is not a de Polignac number, because 649198765795 - 2¹¹ = 649198763747 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6769552 + ... + 6864781.

It is an arithmetic number, because the mean of its divisors is an integer number (49697147430).

Almost surely, 2^649198765795 is an apocalyptic number.

649198765795 is a deficient number, since it is larger than the sum of its proper divisors (145955593085).

649198765795 is a wasteful number, since it uses less digits than its factorization.

649198765795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13634534.

The product of its digits is 1028764800, while the sum is 76.

The spelling of 649198765795 in words is "six hundred forty-nine billion, one hundred ninety-eight million, seven hundred sixty-five thousand, seven hundred ninety-five".