54557816849 has 2 divisors, whose sum is σ = 54557816850. Its totient is φ = 54557816848.

The previous prime is 54557816813. The next prime is 54557816851. The reversal of 54557816849 is 94861875545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54006506449 + 551310400 = 232393^2 + 23480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54557816849 is a prime.

Together with 54557816851, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 54557816791 and 54557816800.

It is not a weakly prime, because it can be changed into another prime (54557816809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27278908424 + 27278908425.

It is an arithmetic number, because the mean of its divisors is an integer number (27278908425).

Almost surely, 2^54557816849 is an apocalyptic number.

It is an amenable number.

54557816849 is a deficient number, since it is larger than the sum of its proper divisors (1).

54557816849 is an equidigital number, since it uses as much as digits as its factorization.

54557816849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384000, while the sum is 62.

The spelling of 54557816849 in words is "fifty-four billion, five hundred fifty-seven million, eight hundred sixteen thousand, eight hundred forty-nine".