1604668594 has 4 divisors (see below), whose sum is σ = 2407002894. Its totient is φ = 802334296.

The previous prime is 1604668589. The next prime is 1604668601. The reversal of 1604668594 is 4958664061.

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

It can be written as a sum of positive squares in only one way, i.e., 1586986569 + 17682025 = 39837^2 + 4205^2 .

It is a super-2 number, since 2×1604668594² = 5149922593139873672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401167147 + ... + 401167150.

Almost surely, 2^1604668594 is an apocalyptic number.

1604668594 is a deficient number, since it is larger than the sum of its proper divisors (802334300).

1604668594 is an equidigital number, since it uses as much as digits as its factorization.

1604668594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802334299.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 1604668594 is about 40058.3149171305. The cubic root of 1604668594 is about 1170.7435782695.

The spelling of 1604668594 in words is "one billion, six hundred four million, six hundred sixty-eight thousand, five hundred ninety-four".