63555922609 has 27 divisors (see below), whose sum is σ = 67730710593. Its totient is φ = 59633452032.

The previous prime is 63555922601. The next prime is 63555922627. The reversal of 63555922609 is 90622955536.

It is a happy number.

The square root of 63555922609 is 252103.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 26584324209 + 36971598400 = 163047^2 + 192280^2 .

It is not a de Polignac number, because 63555922609 - 2³ = 63555922601 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63555922601) 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 26 ways as a sum of consecutive naturals, for example, 562441737 + ... + 562441849.

Almost surely, 2^63555922609 is an apocalyptic number.

63555922609 is the 252103-rd square number.

63555922609 is the 126052-nd centered octagonal number.

It is an amenable number.

63555922609 is a deficient number, since it is larger than the sum of its proper divisors (4174787984).

63555922609 is an frugal number, since it uses more digits than its factorization.

63555922609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 52.

The spelling of 63555922609 in words is "sixty-three billion, five hundred fifty-five million, nine hundred twenty-two thousand, six hundred nine".