1600198591 has 4 divisors (see below), whose sum is σ = 1607248152. Its totient is φ = 1593149032.

The previous prime is 1600198571. The next prime is 1600198597. The reversal of 1600198591 is 1958910061.

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

It is a cyclic number.

It is not a de Polignac number, because 1600198591 - 2¹⁹ = 1599674303 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600198597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3524440 + ... + 3524893.

It is an arithmetic number, because the mean of its divisors is an integer number (401812038).

Almost surely, 2^1600198591 is an apocalyptic number.

1600198591 is a deficient number, since it is larger than the sum of its proper divisors (7049561).

1600198591 is an equidigital number, since it uses as much as digits as its factorization.

1600198591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049560.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 1600198591 is about 40002.4823104767. The cubic root of 1600198591 is about 1169.6554835838.

The spelling of 1600198591 in words is "one billion, six hundred million, one hundred ninety-eight thousand, five hundred ninety-one".