1612305641 has 2 divisors, whose sum is σ = 1612305642. Its totient is φ = 1612305640.

The previous prime is 1612305623. The next prime is 1612305679. The reversal of 1612305641 is 1465032161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234819600 + 377486041 = 35140^2 + 19429^2 .

It is an emirp because it is prime and its reverse (1465032161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1612305641 - 2¹⁸ = 1612043497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1612305601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806152820 + 806152821.

It is an arithmetic number, because the mean of its divisors is an integer number (806152821).

Almost surely, 2^1612305641 is an apocalyptic number.

It is an amenable number.

1612305641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612305641 is an equidigital number, since it uses as much as digits as its factorization.

1612305641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1612305641 is about 40153.5258850328. The cubic root of 1612305641 is about 1172.5979335156.

The spelling of 1612305641 in words is "one billion, six hundred twelve million, three hundred five thousand, six hundred forty-one".