55505550493 has 2 divisors, whose sum is σ = 55505550494. Its totient is φ = 55505550492.

The previous prime is 55505550431. The next prime is 55505550509. The reversal of 55505550493 is 39405550555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47616913369 + 7888637124 = 218213^2 + 88818^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505550493 - 2¹⁷ = 55505419421 is a prime.

It is a super-2 number, since 2×55505550493² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55505554493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752775246 + 27752775247.

It is an arithmetic number, because the mean of its divisors is an integer number (27752775247).

Almost surely, 2^55505550493 is an apocalyptic number.

It is an amenable number.

55505550493 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505550493 is an equidigital number, since it uses as much as digits as its factorization.

55505550493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1687500, while the sum is 46.

The spelling of 55505550493 in words is "fifty-five billion, five hundred five million, five hundred fifty thousand, four hundred ninety-three".