5655016665561 has 32 divisors (see below), whose sum is σ = 7908026849280. Its totient is φ = 3587695372800.

The previous prime is 5655016665491. The next prime is 5655016665589. The reversal of 5655016665561 is 1655666105565.

It is not a de Polignac number, because 5655016665561 - 2¹⁹ = 5655016141273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5655016665061) 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 31 ways as a sum of consecutive naturals, for example, 40564585 + ... + 40703753.

It is an arithmetic number, because the mean of its divisors is an integer number (247125839040).

Almost surely, 2^{5655016665561} is an apocalyptic number.

It is an amenable number.

5655016665561 is a deficient number, since it is larger than the sum of its proper divisors (2253010183719).

5655016665561 is a wasteful number, since it uses less digits than its factorization.

5655016665561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142197.

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 5655016665561 in words is "five trillion, six hundred fifty-five billion, sixteen million, six hundred sixty-five thousand, five hundred sixty-one".