649886655 has 16 divisors (see below), whose sum is σ = 1134347904. Its totient is φ = 315096480.

The previous prime is 649886581. The next prime is 649886663. The reversal of 649886655 is 556688946.

It is a happy number.

It is not a de Polignac number, because 649886655 - 2¹² = 649882559 is a prime.

It is a super-3 number, since 3×649886655³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649886595 and 649886604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969189 + ... + 1969518.

It is an arithmetic number, because the mean of its divisors is an integer number (70896744).

Almost surely, 2^649886655 is an apocalyptic number.

649886655 is a deficient number, since it is larger than the sum of its proper divisors (484461249).

649886655 is a wasteful number, since it uses less digits than its factorization.

649886655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938726.

The product of its digits is 12441600, while the sum is 57.

The square root of 649886655 is about 25492.8745927171. The cubic root of 649886655 is about 866.1887517107.

The spelling of 649886655 in words is "six hundred forty-nine million, eight hundred eighty-six thousand, six hundred fifty-five".