54778538999 has 2 divisors, whose sum is σ = 54778539000. Its totient is φ = 54778538998.

The previous prime is 54778538953. The next prime is 54778539001. The reversal of 54778538999 is 99983587745.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54778538999 - 2⁸ = 54778538743 is a prime.

Together with 54778539001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54778538599) 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, 27389269499 + 27389269500.

It is an arithmetic number, because the mean of its divisors is an integer number (27389269500).

Almost surely, 2^54778538999 is an apocalyptic number.

54778538999 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778538999 is an equidigital number, since it uses as much as digits as its factorization.

54778538999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 685843200, while the sum is 74.

The spelling of 54778538999 in words is "fifty-four billion, seven hundred seventy-eight million, five hundred thirty-eight thousand, nine hundred ninety-nine".