6551724181 has 2 divisors, whose sum is σ = 6551724182. Its totient is φ = 6551724180.

The previous prime is 6551724131. The next prime is 6551724217. The reversal of 6551724181 is 1814271556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6105078225 + 446645956 = 78135^2 + 21134^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551724181 - 2²⁷ = 6417506453 is a prime.

It is a super-2 number, since 2×6551724181² = 85850179487800241522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551724131) 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 as a sum of consecutive naturals, namely, 3275862090 + 3275862091.

It is an arithmetic number, because the mean of its divisors is an integer number (3275862091).

Almost surely, 2^6551724181 is an apocalyptic number.

It is an amenable number.

6551724181 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551724181 is an equidigital number, since it uses as much as digits as its factorization.

6551724181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 6551724181 is about 80942.7216060839. The cubic root of 6551724181 is about 1871.1927895843.

It can be divided in two parts, 65517 and 24181, that added together give a palindrome (89698).

The spelling of 6551724181 in words is "six billion, five hundred fifty-one million, seven hundred twenty-four thousand, one hundred eighty-one".