1605206049 has 16 divisors (see below), whose sum is σ = 2163944640. Its totient is φ = 1058339520.

The previous prime is 1605206023. The next prime is 1605206063. The reversal of 1605206049 is 9406025061.

It is not a de Polignac number, because 1605206049 - 2⁵ = 1605206017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1605207049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182419 + ... + 191015.

It is an arithmetic number, because the mean of its divisors is an integer number (135246540).

Almost surely, 2^1605206049 is an apocalyptic number.

It is an amenable number.

1605206049 is a deficient number, since it is larger than the sum of its proper divisors (558738591).

1605206049 is a wasteful number, since it uses less digits than its factorization.

1605206049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1605206049 is about 40065.0227630036. The cubic root of 1605206049 is about 1170.8742702094.

The spelling of 1605206049 in words is "one billion, six hundred five million, two hundred six thousand, forty-nine".