55664499427 has 2 divisors, whose sum is σ = 55664499428. Its totient is φ = 55664499426.

The previous prime is 55664499337. The next prime is 55664499461. The reversal of 55664499427 is 72499446655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55664499427 - 2¹¹ = 55664497379 is a prime.

It is not a weakly prime, because it can be changed into another prime (55664499227) 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, 27832249713 + 27832249714.

It is an arithmetic number, because the mean of its divisors is an integer number (27832249714).

Almost surely, 2^55664499427 is an apocalyptic number.

55664499427 is a deficient number, since it is larger than the sum of its proper divisors (1).

55664499427 is an equidigital number, since it uses as much as digits as its factorization.

55664499427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65318400, while the sum is 61.

The spelling of 55664499427 in words is "fifty-five billion, six hundred sixty-four million, four hundred ninety-nine thousand, four hundred twenty-seven".