54556778219 has 2 divisors, whose sum is σ = 54556778220. Its totient is φ = 54556778218.

The previous prime is 54556778183. The next prime is 54556778273. The reversal of 54556778219 is 91287765545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54556778219 - 2⁸ = 54556777963 is a prime.

It is a super-2 number, since 2×54556778219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54556778719) 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, 27278389109 + 27278389110.

It is an arithmetic number, because the mean of its divisors is an integer number (27278389110).

Almost surely, 2^54556778219 is an apocalyptic number.

54556778219 is a deficient number, since it is larger than the sum of its proper divisors (1).

54556778219 is an equidigital number, since it uses as much as digits as its factorization.

54556778219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168000, while the sum is 59.

The spelling of 54556778219 in words is "fifty-four billion, five hundred fifty-six million, seven hundred seventy-eight thousand, two hundred nineteen".