1605598113 has 16 divisors (see below), whose sum is σ = 2503525376. Its totient is φ = 896147280.

The previous prime is 1605598087. The next prime is 1605598157. The reversal of 1605598113 is 3118955061.

It is not a de Polignac number, because 1605598113 - 2²⁸ = 1337162657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605598193) 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, 888133 + ... + 889938.

It is an arithmetic number, because the mean of its divisors is an integer number (156470336).

Almost surely, 2^1605598113 is an apocalyptic number.

It is an amenable number.

1605598113 is a deficient number, since it is larger than the sum of its proper divisors (897927263).

1605598113 is a wasteful number, since it uses less digits than its factorization.

1605598113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778124.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 1605598113 is about 40069.9153106168. The cubic root of 1605598113 is about 1170.9695892872.

The spelling of 1605598113 in words is "one billion, six hundred five million, five hundred ninety-eight thousand, one hundred thirteen".