55479720229649 has 2 divisors, whose sum is σ = 55479720229650. Its totient is φ = 55479720229648.

The previous prime is 55479720229643. The next prime is 55479720229721. The reversal of 55479720229649 is 94692202797455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39240915762049 + 16238804467600 = 6264257^2 + 4029740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55479720229649 is a prime.

It is not a weakly prime, because it can be changed into another prime (55479720229643) 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, 27739860114824 + 27739860114825.

It is an arithmetic number, because the mean of its divisors is an integer number (27739860114825).

Almost surely, 2^{55479720229649} is an apocalyptic number.

It is an amenable number.

55479720229649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55479720229649 is an equidigital number, since it uses as much as digits as its factorization.

55479720229649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 685843200, while the sum is 71.

The spelling of 55479720229649 in words is "fifty-five trillion, four hundred seventy-nine billion, seven hundred twenty million, two hundred twenty-nine thousand, six hundred forty-nine".