1605694150393 has 2 divisors, whose sum is σ = 1605694150394. Its totient is φ = 1605694150392.

The previous prime is 1605694150351. The next prime is 1605694150439. The reversal of 1605694150393 is 3930514965061.

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., 1589019076969 + 16675073424 = 1260563^2 + 129132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605694150393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1605694150393.

It is not a weakly prime, because it can be changed into another prime (1605694150993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802847075196 + 802847075197.

It is an arithmetic number, because the mean of its divisors is an integer number (802847075197).

Almost surely, 2^{1605694150393} is an apocalyptic number.

It is an amenable number.

1605694150393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605694150393 is an equidigital number, since it uses as much as digits as its factorization.

1605694150393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 1605694150393 in words is "one trillion, six hundred five billion, six hundred ninety-four million, one hundred fifty thousand, three hundred ninety-three".