6551406013 has 4 divisors (see below), whose sum is σ = 6570178300. Its totient is φ = 6532633728.

The previous prime is 6551406011. The next prime is 6551406067. The reversal of 6551406013 is 3106041556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5158399684 + 1393006329 = 71822^2 + 37323^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551406013 - 2¹ = 6551406011 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 (6551406011) 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 in 3 ways as a sum of consecutive naturals, for example, 9385620 + ... + 9386317.

It is an arithmetic number, because the mean of its divisors is an integer number (1642544575).

Almost surely, 2^6551406013 is an apocalyptic number.

It is an amenable number.

6551406013 is a deficient number, since it is larger than the sum of its proper divisors (18772287).

6551406013 is a wasteful number, since it uses less digits than its factorization.

6551406013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772286.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 6551406013 is about 80940.7561924152. The cubic root of 6551406013 is about 1871.1624991708.

Adding to 6551406013 its reverse (3106041556), we get a palindrome (9657447569).

The spelling of 6551406013 in words is "six billion, five hundred fifty-one million, four hundred six thousand, thirteen".