551809882469 has 2 divisors, whose sum is σ = 551809882470. Its totient is φ = 551809882468.

The previous prime is 551809882441. The next prime is 551809882487. The reversal of 551809882469 is 964288908155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508851102244 + 42958780225 = 713338^2 + 207265^2 .

It is a cyclic number.

It is not a de Polignac number, because 551809882469 - 2⁸ = 551809882213 is a prime.

It is a super-2 number, since 2×551809882469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551809882489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275904941234 + 275904941235.

It is an arithmetic number, because the mean of its divisors is an integer number (275904941235).

Almost surely, 2^551809882469 is an apocalyptic number.

It is an amenable number.

551809882469 is a deficient number, since it is larger than the sum of its proper divisors (1).

551809882469 is an equidigital number, since it uses as much as digits as its factorization.

551809882469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49766400, while the sum is 65.

The spelling of 551809882469 in words is "five hundred fifty-one billion, eight hundred nine million, eight hundred eighty-two thousand, four hundred sixty-nine".