55318236643 has 2 divisors, whose sum is σ = 55318236644. Its totient is φ = 55318236642.

The previous prime is 55318236553. The next prime is 55318236647. The reversal of 55318236643 is 34663281355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55318236643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55318236593 and 55318236602.

It is not a weakly prime, because it can be changed into another prime (55318236647) 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, 27659118321 + 27659118322.

It is an arithmetic number, because the mean of its divisors is an integer number (27659118322).

Almost surely, 2^55318236643 is an apocalyptic number.

55318236643 is a deficient number, since it is larger than the sum of its proper divisors (1).

55318236643 is an equidigital number, since it uses as much as digits as its factorization.

55318236643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 46.

The spelling of 55318236643 in words is "fifty-five billion, three hundred eighteen million, two hundred thirty-six thousand, six hundred forty-three".