55555777727 has 2 divisors, whose sum is σ = 55555777728. Its totient is φ = 55555777726.

The previous prime is 55555777687. The next prime is 55555777883. The reversal of 55555777727 is 72777755555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55555777727 - 2⁶ = 55555777663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55555777727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555777027) 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, 27777888863 + 27777888864.

It is an arithmetic number, because the mean of its divisors is an integer number (27777888864).

Almost surely, 2^55555777727 is an apocalyptic number.

55555777727 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555777727 is an equidigital number, since it uses as much as digits as its factorization.

55555777727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105043750, while the sum is 62.

The spelling of 55555777727 in words is "fifty-five billion, five hundred fifty-five million, seven hundred seventy-seven thousand, seven hundred twenty-seven".