55688688656 has 10 divisors (see below), whose sum is σ = 107896834302. Its totient is φ = 27844344320.

The previous prime is 55688688637. The next prime is 55688688683. The reversal of 55688688656 is 65688688655.

It can be written as a sum of positive squares in only one way, i.e., 39172326400 + 16516362256 = 197920^2 + 128516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55688688656.

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 as a sum of consecutive naturals, namely, 1740271505 + ... + 1740271536.

Almost surely, 2^55688688656 is an apocalyptic number.

It is an amenable number.

55688688656 is a deficient number, since it is larger than the sum of its proper divisors (52208145646).

55688688656 is a wasteful number, since it uses less digits than its factorization.

55688688656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480543049 (or 3480543043 counting only the distinct ones).

The product of its digits is 663552000, while the sum is 71.

Subtracting 55688688656 from its reverse (65688688655), we obtain a palindrome (9999999999).

The spelling of 55688688656 in words is "fifty-five billion, six hundred eighty-eight million, six hundred eighty-eight thousand, six hundred fifty-six".