551709215549 has 2 divisors, whose sum is σ = 551709215550. Its totient is φ = 551709215548.

The previous prime is 551709215521. The next prime is 551709215567. The reversal of 551709215549 is 945512907155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544801943449 + 6907272100 = 738107^2 + 83110^2 .

It is a cyclic number.

It is not a de Polignac number, because 551709215549 - 2²⁴ = 551692438333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 551709215549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551709215579) 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, 275854607774 + 275854607775.

It is an arithmetic number, because the mean of its divisors is an integer number (275854607775).

Almost surely, 2^551709215549 is an apocalyptic number.

It is an amenable number.

551709215549 is a deficient number, since it is larger than the sum of its proper divisors (1).

551709215549 is an equidigital number, since it uses as much as digits as its factorization.

551709215549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835000, while the sum is 53.

The spelling of 551709215549 in words is "five hundred fifty-one billion, seven hundred nine million, two hundred fifteen thousand, five hundred forty-nine".