55405250497 has 2 divisors, whose sum is σ = 55405250498. Its totient is φ = 55405250496.

The previous prime is 55405250441. The next prime is 55405250503. The reversal of 55405250497 is 79405250455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53051448241 + 2353802256 = 230329^2 + 48516^2 .

It is a cyclic number.

It is not a de Polignac number, because 55405250497 - 2²⁷ = 55271032769 is a prime.

It is not a weakly prime, because it can be changed into another prime (55405256497) 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, 27702625248 + 27702625249.

It is an arithmetic number, because the mean of its divisors is an integer number (27702625249).

Almost surely, 2^55405250497 is an apocalyptic number.

It is an amenable number.

55405250497 is a deficient number, since it is larger than the sum of its proper divisors (1).

55405250497 is an equidigital number, since it uses as much as digits as its factorization.

55405250497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 55405250497 in words is "fifty-five billion, four hundred five million, two hundred fifty thousand, four hundred ninety-seven".