1605846461 has 2 divisors, whose sum is σ = 1605846462. Its totient is φ = 1605846460.

The previous prime is 1605846439. The next prime is 1605846479. The reversal of 1605846461 is 1646485061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1573708900 + 32137561 = 39670^2 + 5669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1605846461 - 2²⁶ = 1538737597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605846761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802923230 + 802923231.

It is an arithmetic number, because the mean of its divisors is an integer number (802923231).

Almost surely, 2^1605846461 is an apocalyptic number.

It is an amenable number.

1605846461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605846461 is an equidigital number, since it uses as much as digits as its factorization.

1605846461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1605846461 is about 40073.0141242208. The cubic root of 1605846461 is about 1171.0299599284.

The spelling of 1605846461 in words is "one billion, six hundred five million, eight hundred forty-six thousand, four hundred sixty-one".