551601611 has 12 divisors (see below), whose sum is σ = 607916400. Its totient is φ = 500124240.

The previous prime is 551601563. The next prime is 551601613. The reversal of 551601611 is 116106155.

It is not a de Polignac number, because 551601611 - 2¹⁰ = 551600587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551601613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41210 + ... + 52928.

It is an arithmetic number, because the mean of its divisors is an integer number (50659700).

Almost surely, 2^551601611 is an apocalyptic number.

551601611 is a deficient number, since it is larger than the sum of its proper divisors (56314789).

551601611 is a wasteful number, since it uses less digits than its factorization.

551601611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130 (or 12119 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 551601611 is about 23486.2004377038. The cubic root of 551601611 is about 820.1157931859.

Adding to 551601611 its reverse (116106155), we get a palindrome (667707766).

The spelling of 551601611 in words is "five hundred fifty-one million, six hundred one thousand, six hundred eleven".