55721966648227 has 16 divisors (see below), whose sum is σ = 61322901260544. Its totient is φ = 50211704340000.

The previous prime is 55721966648207. The next prime is 55721966648251. The reversal of 55721966648227 is 72284666912755.

55721966648227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55721966648227 - 2²³ = 55721958259619 is a prime.

It is a super-2 number, since 2×55721966648227² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55721966648207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35619573 + ... + 37151014.

It is an arithmetic number, because the mean of its divisors is an integer number (3832681328784).

Almost surely, 2^{55721966648227} is an apocalyptic number.

55721966648227 is a deficient number, since it is larger than the sum of its proper divisors (5600934612317).

55721966648227 is a wasteful number, since it uses less digits than its factorization.

55721966648227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72771210.

The product of its digits is 609638400, while the sum is 70.

The spelling of 55721966648227 in words is "fifty-five trillion, seven hundred twenty-one billion, nine hundred sixty-six million, six hundred forty-eight thousand, two hundred twenty-seven".