55546940692391 has 2 divisors, whose sum is σ = 55546940692392. Its totient is φ = 55546940692390.

The previous prime is 55546940692297. The next prime is 55546940692393. The reversal of 55546940692391 is 19329604964555.

55546940692391 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55546940692391 is a prime.

Together with 55546940692393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55546940692393) 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, 27773470346195 + 27773470346196.

It is an arithmetic number, because the mean of its divisors is an integer number (27773470346196).

Almost surely, 2^{55546940692391} is an apocalyptic number.

55546940692391 is a deficient number, since it is larger than the sum of its proper divisors (1).

55546940692391 is an equidigital number, since it uses as much as digits as its factorization.

55546940692391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928000, while the sum is 68.

The spelling of 55546940692391 in words is "fifty-five trillion, five hundred forty-six billion, nine hundred forty million, six hundred ninety-two thousand, three hundred ninety-one".