551568128567 has 4 divisors (see below), whose sum is σ = 557765523360. Its totient is φ = 545370733776.

The previous prime is 551568128539. The next prime is 551568128581. The reversal of 551568128567 is 765821865155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551568128567 - 2¹⁰ = 551568127543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551568128467) 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 in 3 ways as a sum of consecutive naturals, for example, 3098697263 + ... + 3098697440.

It is an arithmetic number, because the mean of its divisors is an integer number (139441380840).

Almost surely, 2^551568128567 is an apocalyptic number.

551568128567 is a deficient number, since it is larger than the sum of its proper divisors (6197394793).

551568128567 is an equidigital number, since it uses as much as digits as its factorization.

551568128567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197394792.

The product of its digits is 20160000, while the sum is 59.

The spelling of 551568128567 in words is "five hundred fifty-one billion, five hundred sixty-eight million, one hundred twenty-eight thousand, five hundred sixty-seven".