1612128481 has 2 divisors, whose sum is σ = 1612128482. Its totient is φ = 1612128480.

The previous prime is 1612128451. The next prime is 1612128491. The reversal of 1612128481 is 1848212161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1348358400 + 263770081 = 36720^2 + 16241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612128481 - 2¹⁹ = 1611604193 is a prime.

It is a super-2 number, since 2×1612128481² = 5197916478502734722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1612128451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806064240 + 806064241.

It is an arithmetic number, because the mean of its divisors is an integer number (806064241).

Almost surely, 2^1612128481 is an apocalyptic number.

It is an amenable number.

1612128481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612128481 is an equidigital number, since it uses as much as digits as its factorization.

1612128481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 34.

The square root of 1612128481 is about 40151.3197915087. The cubic root of 1612128481 is about 1172.5549836236.

The spelling of 1612128481 in words is "one billion, six hundred twelve million, one hundred twenty-eight thousand, four hundred eighty-one".