655222216649 has 64 divisors (see below), whose sum is σ = 935310716928. Its totient is φ = 442291449600.

The previous prime is 655222216643. The next prime is 655222216657. The reversal of 655222216649 is 946612222556.

It is not a de Polignac number, because 655222216649 - 2³² = 650927249353 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 655222216597 and 655222216606.

It is not an unprimeable number, because it can be changed into a prime (655222216643) 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 63 ways as a sum of consecutive naturals, for example, 951734 + ... + 1488704.

It is an arithmetic number, because the mean of its divisors is an integer number (14614229952).

Almost surely, 2^655222216649 is an apocalyptic number.

It is an amenable number.

655222216649 is a deficient number, since it is larger than the sum of its proper divisors (280088500279).

655222216649 is a wasteful number, since it uses less digits than its factorization.

655222216649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537078.

The product of its digits is 3110400, while the sum is 50.

The spelling of 655222216649 in words is "six hundred fifty-five billion, two hundred twenty-two million, two hundred sixteen thousand, six hundred forty-nine".