1330644481 has 2 divisors, whose sum is σ = 1330644482. Its totient is φ = 1330644480.

The previous prime is 1330644467. The next prime is 1330644517. The reversal of 1330644481 is 1844460331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1209996225 + 120648256 = 34785^2 + 10984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330644481 - 2⁵ = 1330644449 is a prime.

It is a super-2 number, since 2×1330644481² = 3541229469631518722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1334644481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665322240 + 665322241.

It is an arithmetic number, because the mean of its divisors is an integer number (665322241).

Almost surely, 2^1330644481 is an apocalyptic number.

It is an amenable number.

1330644481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330644481 is an equidigital number, since it uses as much as digits as its factorization.

1330644481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 1330644481 is about 36477.9999588793. Note that the first 4 decimals coincide. The cubic root of 1330644481 is about 1099.9020521602.

The spelling of 1330644481 in words is "one billion, three hundred thirty million, six hundred forty-four thousand, four hundred eighty-one".