54778543067 has 2 divisors, whose sum is σ = 54778543068. Its totient is φ = 54778543066.

The previous prime is 54778543051. The next prime is 54778543117. The reversal of 54778543067 is 76034587745.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54778543067 - 2⁴ = 54778543051 is a prime.

It is not a weakly prime, because it can be changed into another prime (54778543667) 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 as a sum of consecutive naturals, namely, 27389271533 + 27389271534.

It is an arithmetic number, because the mean of its divisors is an integer number (27389271534).

Almost surely, 2^54778543067 is an apocalyptic number.

54778543067 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778543067 is an equidigital number, since it uses as much as digits as its factorization.

54778543067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 54778543067 in words is "fifty-four billion, seven hundred seventy-eight million, five hundred forty-three thousand, sixty-seven".