551536649 has 8 divisors (see below), whose sum is σ = 559927080. Its totient is φ = 543195136.

The previous prime is 551536637. The next prime is 551536651. The reversal of 551536649 is 946635155.

It can be written as a sum of positive squares in 4 ways, for example, as 197908624 + 353628025 = 14068^2 + 18805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551536649 - 2²⁰ = 550488073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551536669) 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 7 ways as a sum of consecutive naturals, for example, 10817 + ... + 34929.

It is an arithmetic number, because the mean of its divisors is an integer number (69990885).

Almost surely, 2^551536649 is an apocalyptic number.

It is an amenable number.

551536649 is a deficient number, since it is larger than the sum of its proper divisors (8390431).

551536649 is a wasteful number, since it uses less digits than its factorization.

551536649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24459.

The product of its digits is 486000, while the sum is 44.

The square root of 551536649 is about 23484.8174146618. The cubic root of 551536649 is about 820.0835969700.

The spelling of 551536649 in words is "five hundred fifty-one million, five hundred thirty-six thousand, six hundred forty-nine".