54550216691 has 2 divisors, whose sum is σ = 54550216692. Its totient is φ = 54550216690.

The previous prime is 54550216657. The next prime is 54550216729. The reversal of 54550216691 is 19661205545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54550216691 - 2²⁶ = 54483107827 is a prime.

It is a super-2 number, since 2×54550216691² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54550716691) 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 as a sum of consecutive naturals, namely, 27275108345 + 27275108346.

It is an arithmetic number, because the mean of its divisors is an integer number (27275108346).

Almost surely, 2^54550216691 is an apocalyptic number.

54550216691 is a deficient number, since it is larger than the sum of its proper divisors (1).

54550216691 is an equidigital number, since it uses as much as digits as its factorization.

54550216691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 54550216691 in words is "fifty-four billion, five hundred fifty million, two hundred sixteen thousand, six hundred ninety-one".