55639700793661 has 2 divisors, whose sum is σ = 55639700793662. Its totient is φ = 55639700793660.

The previous prime is 55639700793641. The next prime is 55639700793667. The reversal of 55639700793661 is 16639700793655.

55639700793661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40566632209636 + 15073068584025 = 6369194^2 + 3882405^2 .

It is a cyclic number.

It is not a de Polignac number, because 55639700793661 - 2¹¹ = 55639700791613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55639700793667) 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, 27819850396830 + 27819850396831.

It is an arithmetic number, because the mean of its divisors is an integer number (27819850396831).

Almost surely, 2^{55639700793661} is an apocalyptic number.

It is an amenable number.

55639700793661 is a deficient number, since it is larger than the sum of its proper divisors (1).

55639700793661 is an equidigital number, since it uses as much as digits as its factorization.

55639700793661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192893400, while the sum is 67.

The spelling of 55639700793661 in words is "fifty-five trillion, six hundred thirty-nine billion, seven hundred million, seven hundred ninety-three thousand, six hundred sixty-one".