55708880729 has 2 divisors, whose sum is σ = 55708880730. Its totient is φ = 55708880728.

The previous prime is 55708880671. The next prime is 55708880771. The reversal of 55708880729 is 92708880755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29781440329 + 25927440400 = 172573^2 + 161020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55708880729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55708880789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27854440364 + 27854440365.

It is an arithmetic number, because the mean of its divisors is an integer number (27854440365).

Almost surely, 2^55708880729 is an apocalyptic number.

It is an amenable number.

55708880729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55708880729 is an equidigital number, since it uses as much as digits as its factorization.

55708880729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11289600, while the sum is 59.

The spelling of 55708880729 in words is "fifty-five billion, seven hundred eight million, eight hundred eighty thousand, seven hundred twenty-nine".