551330987617 has 2 divisors, whose sum is σ = 551330987618. Its totient is φ = 551330987616.

The previous prime is 551330987593. The next prime is 551330987621. The reversal of 551330987617 is 716789033155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481759539921 + 69571447696 = 694089^2 + 263764^2 .

It is a cyclic number.

It is not a de Polignac number, because 551330987617 - 2³⁹ = 1575173729 is a prime.

It is not a weakly prime, because it can be changed into another prime (551330987687) 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, 275665493808 + 275665493809.

It is an arithmetic number, because the mean of its divisors is an integer number (275665493809).

Almost surely, 2^551330987617 is an apocalyptic number.

It is an amenable number.

551330987617 is a deficient number, since it is larger than the sum of its proper divisors (1).

551330987617 is an equidigital number, since it uses as much as digits as its factorization.

551330987617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 551330987617 in words is "five hundred fifty-one billion, three hundred thirty million, nine hundred eighty-seven thousand, six hundred seventeen".