1601664198 has 16 divisors (see below), whose sum is σ = 3215239920. Its totient is φ = 531902816.

The previous prime is 1601664173. The next prime is 1601664199. The reversal of 1601664198 is 8914661061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601664199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494565 + ... + 497792.

It is an arithmetic number, because the mean of its divisors is an integer number (200952495).

Almost surely, 2^1601664198 is an apocalyptic number.

1601664198 is an abundant number, since it is smaller than the sum of its proper divisors (1613575722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601664198 is a wasteful number, since it uses less digits than its factorization.

1601664198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992631.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1601664198 is about 40020.7970685243. The cubic root of 1601664198 is about 1170.0124668114.

The spelling of 1601664198 in words is "one billion, six hundred one million, six hundred sixty-four thousand, one hundred ninety-eight".