551665122011 has 16 divisors (see below), whose sum is σ = 568473850080. Its totient is φ = 535109203200.

The previous prime is 551665121981. The next prime is 551665122059. The reversal of 551665122011 is 110221566155.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551665122011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551665122611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3580655 + ... + 3731543.

It is an arithmetic number, because the mean of its divisors is an integer number (35529615630).

Almost surely, 2^551665122011 is an apocalyptic number.

551665122011 is a deficient number, since it is larger than the sum of its proper divisors (16808728069).

551665122011 is a wasteful number, since it uses less digits than its factorization.

551665122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151726.

The product of its (nonzero) digits is 18000, while the sum is 35.

Adding to 551665122011 its reverse (110221566155), we get a palindrome (661886688166).

The spelling of 551665122011 in words is "five hundred fifty-one billion, six hundred sixty-five million, one hundred twenty-two thousand, eleven".