6551445481 has 27 divisors (see below), whose sum is σ = 7896009303. Its totient is φ = 5419809360.

The previous prime is 6551445449. The next prime is 6551445493. The reversal of 6551445481 is 1845441556.

The square root of 6551445481 is 80941.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3561105625 + 2990339856 = 59675^2 + 54684^2 .

It is not a de Polignac number, because 6551445481 - 2⁵ = 6551445449 is a prime.

It is a super-2 number, since 2×6551445481² = 85842875781030642722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6551445401) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17564011 + ... + 17564383.

It is an arithmetic number, because the mean of its divisors is an integer number (292444789).

Almost surely, 2^6551445481 is an apocalyptic number.

6551445481 is the 80941-st square number.

6551445481 is the 40471-st centered octagonal number.

It is an amenable number.

6551445481 is a deficient number, since it is larger than the sum of its proper divisors (1344563822).

6551445481 is an frugal number, since it uses more digits than its factorization.

6551445481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 411 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The cubic root of 6551445481 is about 1871.1662566794.

The spelling of 6551445481 in words is "six billion, five hundred fifty-one million, four hundred forty-five thousand, four hundred eighty-one".