1605016011 has 4 divisors (see below), whose sum is σ = 2140021352. Its totient is φ = 1070010672.

The previous prime is 1605015959. The next prime is 1605016027. The reversal of 1605016011 is 1106105061.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1605016011 - 2⁹ = 1605015499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605016031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267502666 + ... + 267502671.

It is an arithmetic number, because the mean of its divisors is an integer number (535005338).

Almost surely, 2^1605016011 is an apocalyptic number.

1605016011 is a deficient number, since it is larger than the sum of its proper divisors (535005341).

1605016011 is an equidigital number, since it uses as much as digits as its factorization.

1605016011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535005340.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1605016011 is about 40062.6510730381. The cubic root of 1605016011 is about 1170.8280623542.

The spelling of 1605016011 in words is "one billion, six hundred five million, sixteen thousand, eleven".