55505454491 has 2 divisors, whose sum is σ = 55505454492. Its totient is φ = 55505454490.

The previous prime is 55505454437. The next prime is 55505454517. The reversal of 55505454491 is 19445450555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55505454491 is a prime.

It is not a weakly prime, because it can be changed into another prime (55505354491) 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, 27752727245 + 27752727246.

It is an arithmetic number, because the mean of its divisors is an integer number (27752727246).

Almost surely, 2^55505454491 is an apocalyptic number.

55505454491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505454491 is an equidigital number, since it uses as much as digits as its factorization.

55505454491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800000, while the sum is 47.

The spelling of 55505454491 in words is "fifty-five billion, five hundred five million, four hundred fifty-four thousand, four hundred ninety-one".